Lena, once a rule-following goodie-two-shoes, starts to wait outside convenience stores so older men will buy her cigarettes. She sits in her attic and paints while she lights cigarettes and watches them burn, but she doesn't smoke them. The ghost of her twin sister, Maddie, sits with her in the attic, but only Lena can see her. Maddie was the one who smoked. That summer, three bodies were pulled from a nearby river, and one of them was Maddie. After her mom and dad call Lena down from the attic, they insist she goes to the cotillion dance with Maddie's ex-boyfriend, their next-door neighbor James. The rehearsal for the dance is that evening, and despite Lena's reservations, she agrees to go. Back in her room, Lena looks out her window and sees James in his room. She climbs across the tree and through his window. James asks about cotillion and Lena tries to kiss him. When he refuses, she leaves in a hurry. At the cotillion rehearsal, Lena is miserable. She messes up the dance and can't quite focus. Lena grabs James' arm, leads him outside, and hails a taxi. They end up at the Key Bridge boathouse. They light cigarettes and toss them in the river, where Maddie's body was found that summer. Lena takes the pack of cigarettes and throws them in the river as a way to finally say goodbye.