Synopsis
Adele, a J-1 exchange student from Estonia, arrives in the Hamptons for a summer of work and travel. She falls in love with Kyle, the entitled son of a local billionaire, and befriends fellow J-1er Teresa, who cautions her against the relationship. However, Teresa is also on a mission to investigate the mysterious disappearances of other J-1 girls who worked with her in previous summers. As the story unfolds, Teresa's rage intensifies, causing her to develop strange green flickers on her skin.
Despite Teresa's warnings, Adele moves in with Kyle and forgets about her fiancé back home. Kyle later breaks up with her, sending himself on a drug binge where he is haunted by ghosts. Adele saves him from overdosing, but Teresa seeks revenge on Kyle for past wrongs that she blames on him. She goes on a killing spree, covering up her actions by claiming the victims drowned in riptide currents. Teresa's supernatural qualities become increasingly prominent and evident.
In a final confrontation between Adele and Teresa, Teresa is fatally injured by accident. However, her body cannot be located by the police, leaving Adele to fear her possible return for revenge. Despite this, Adele chooses to stay with Kyle and help him reassess his life, much to the relief of his parents. The story is infused with mystical elements, with myths of the Hamptons woven into the plot.