YAPHANK, N.Y. — On a Sunday afternoon earlier this month, the playwright Bess Wohl stood on the shores of a lake in this Long Island hamlet about 60 miles from Manhattan. She admired the surface pleasures of the scene — the water, the leaves, a sky the blue of a faded Tiffany’s box, an obliging swan.“But I also see history,” she said. “I see what happened here.”What happened here was a summer camp, operated in the 1930s by the German American Bund, a pro-Nazi organization. Its teenage participants swam, hiked, competed in archery and went to dances, all the while absorbing Nazi ideology.“On the surface,” said Arnie Bernstein, the author of a book on the German American Bund, “it was like any other camp, except it was filled with swastikas.”The flower beds and rose bushes, he noted, were planted in swastika patterns. And there are photos of the camp of rallies that look like smaller, more rustic versions of Nuremberg.The camp finally closed in 1941, not long after the United States entered World War II. And the town erased it from memory. At the lake the local historical society sponsored a display board, detailing the history of Yaphank. The 1930s and Camp Siegfried were elided.Wohl has salvaged that history in “Camp Siegfried,” an intimate two-character play directed by David Cromer. It’s in previews now, and opens on Nov. 15 at Second Stage’s Tony Kiser Theater. Over the course of a summer, a nameless boy, 17, and a girl, 16, fall in and out of what isn’t exactly love. It’s a play about seduction, Wohl believes — by bodies, by beliefs, by stories.The entrance to the camp.Bettmann, via Getty Images Former camp grounds in Yaphank. “If we’re going to live up to the moral imperative of ‘never again,’ we have to look at these stories, we have to tell these stories and we have to learn from them,” the playwright Bess Wohl said.Jeenah Moon for The New York TimesShe learned about Camp Siegfried about two years ago, during the first summer of the pandemic. She and her husband, the public relations executive Steven Rubenstein, had booked an Airbnb in nearby Bellport. One morning, while Googling area attractions that she could visit with her three young daughters, Wohl stumbled on a site that gave the history of the camp and then she stumbled further, finding photos and archival film.“I was like, this can’t have happened right in my backyard,” she said. “It honestly seemed like a mistake at first, that these pictures were pictures of America.”This was an anxious summer, with both the coronavirus and President Trump’s re-election campaign raging. Wohl found herself driving, alone, through the private roads of what had once been the camp and the nearby bungalow community, with streets named for Hitler, Goebbels, Goering. (Those names have long been changed, but a restrictive housing covenant, which allowed only buyers who could prove German ancestry, stood until 2017.) On those drives, she was looking for evidence of what this place had been and how its past had been.On that Sunday in October, we took a similar drive, past Bach Court and Schiller Court, past signs that announced the community as private and the roads as having no outlet. There were no swastikas anymore. American flags and Trump flags had replaced the Nazi ones. A handful of buildings and bungalows from the 1930s remained. Otherwise the community looked aggressively normal, if strangely deserted, which had been Wohl’s experience.“What shocked me the most was how mundane and pretty and sort of regular everything seemed,” she said. “It’s part of what prompted me to write the play, because if we’re going to live up to the moral imperative of ‘never again,’ we have to look at these stories, we have to tell these stories and we have to learn from them.”For much of its running time, “Camp Siegfried” resembles a romantic drama, a coming-of-age story. That’s a queasy proposition, considering the play’s setting. In this boy-meets-girl, the girl lives on Hitler Street. Wohl — who has Jewish ancestry, a Jewish husband and is raising her daughters in the Jewish faith — is mindful of this, anxious even.“I find her very nervous about these risks,” Cromer, who is also Jewish, said during a phone interview, “beautifully nervous and not self-congratulatory about them at all. But that doesn’t stop her from taking them. It is difficult for her not to take these big risks. And then she executes them with rigor and thoroughness and depth. She does irresponsible things really responsibly.”Back in the 1930s: Adolf Hitler Street ran through Camp Siegfried.Bettmann, via Getty Images And now: Streets named for Hitler, Goebbels and Goering have long been changed, but a restrictive housing covenant, which allowed only buyers who could prove German ancestry, stood until 2017.Jeenah Moon for The New York TimesWohl’s theater has always involved a certain amount of risk, of contradiction. Her plays often begin as thought experiments or personal dares. Could you write a play (“Small Mouth Sounds”) that is largely silent? Could you write a play (“Make Believe”) with a first act populated exclusively by children? What about a musical (“Pretty Filthy”) about the porn industry? Or a show (“Grand Horizons”) about the sexual and romantic lives of retirees?“She always goes just to the left of where you think she’s going to land on something,” said Leigh Silverman, who has directed two of Wohl’s plays, the Tony-nominated “Grand Horizons” and the early comedy “American Hero.” “She’s always going to embrace the weird, she’s always going to embrace the strange choice. She’s always going to keep pushing herself to do something different. She refuses to repeat the same genre, the same idea.”Recently, she has further expanded her command of genre and medium, writing and directing the psychological horror film “Baby Ruby,” slated for release next year by Magnolia Pictures; writing for the forthcoming Apple TV+ climate change anthology series, “Extrapolations”; and adapting “The Children’s Hour,” a 1934 play by Lillian Hellman, for television.Yet there are continuities among these works. Most of them operate with ample surface charm. (Wohl — funny, frazzled, wildly incisive, with a doll-like prettiness — operates that way, too.) “Small Mouth Sounds,” to take one example, is screamingly funny. But the screaming is the point. An author’s note that begins the play reads: “Everyone in the play is in some kind of agony. In this way they are not unlike the rest of us.”Rachel Chavkin, who directed “Small Mouth Sounds,” saw Wohl herself in that note. “I always think about Bess talking about the most tragic thing, and her heart simultaneously breaking as she’s laughing,” Chavkin said. “She’s holding the tragedy and the comedy in equal measure.”Luke Thallon and Patsy Ferran in a version of the play in London at the Old Vic in 2021.Manuel Harlan Wohl didn’t disagree. She likes to write plays and characters that arrive in familiar containers. “And then I lift the lid and there’s just nothing but agony,” she said. “The humor in my plays comes from deep, deep agony. Like really deep agony. That’s the rub that interests me.”This dual register — charm on top, existential anguish all the way down — attracts actors to her work. “That’s all you hope for,” said Samantha Mathis, who starred in “Make Believe.” “Comedy comes from extremes of emotion. So you just have to tap into the extremity of pain that these people are in and the truth of what she’s talking about, which is how excruciating it can be to be a human being sometimes.”Brad Heberlee, who has known Wohl since their days as actors at the Yale School of Drama and has starred in three of her plays, echoed this. “Her writing requires actors to bring their entire humanity,” he said. “The only way it can live is if you attach yourself to the depth of pain these people have, the truth of that.”Both of the “Camp Siegfried” characters are in deep pain — and really, what teenager isn’t? — which becomes more evident as the play goes on. “Camp Siegfried” balances sympathy for them with a horror of their situation and the hope that they may yet escape it.Wohl wrote the first draft swiftly, intuitively, in snatched moments during the summer of 2020, in a sweltering room at the top of the rental house while her children slept or watched “CoComelon.” A version of this draft was staged in London at the Old Vic in 2021. The critic for The Independent described it as “a consummately clever and insightful piece about the frightening psychological appeal of fascism.”“Telling these stories is a way of bearing witness and saying we have to pay attention,” Wohl said.Jeenah Moon for The New York TimesAfter that, Wohl wrote a new draft, with six characters, and then another, which shrank it back down to a two-hander, its central couple now deepened, the camp around them more convincingly imagined. The trick, she felt, was to balance the ordinariness and seeming wholesomeness of the setting — the swimming, the cookouts — with the genocidal ideas that circulated there. That moral danger had to be apparent, but not immediately. Indoctrination doesn’t usually happen all at once.“They don’t say to you, Hey, do you want to, like, kill an entire race of people?” Wohl said. “They say, You want to feel good, don’t you? You want to be part of a community? You love your country? You want to be a good person?” Indoctrination is stealthy, and so the play is stealthy, too, seducing the audience as the characters are seduced and then helping the viewers to shake off that seduction.“Camp Siegfried” joins several other current shows — “This Beautiful Future,” “Remember This,” “Leopoldstadt” — in exploring the roots and devastations of Nazism. But those plays all concern what happened in Europe. “Camp Siegfried” is local, set less than an hour’s drive from Second Stage, which makes the play a more precarious prospect here than in its London staging.“This is a deeply American play. It’s about America,” she said. “It feels very alive to do it right here.”Cromer wasn’t sure how American audiences would receive the play and its characters. “I’m scared if they love them,” he said. “If they hate them, I worry about that.”Yet “Camp Siegfried,” he thought, was worth the worry. Wohl believes that almost any play about this time and these events would be. Because if we know our history, maybe we won’t repeat it. Maybe we’ll have fewer genocides, insurrections, groundless invasions. Maybe not. But it’s the job of artists to try.In the parked car that same afternoon, Wohl looked out at what had been Hitler Street. “Telling these stories is a way of bearing witness and saying we have to pay attention,” she said. “Just keep telling and telling and telling the story. That’s how you keep it alive.” More