The Best Movies and TV Shows Like I Know What You Did Last Summer

Set in the deceptively idyllic, sun-drenched coastal town of Waiheke Island, *I Know What You Did Last Summer* follows a tight-knit group of teenagers hiding a devastating secret. Exactly one year after a fatal car accident on graduation night—where they accidentally struck and killed one of their own twins, Lennon, while driving under the influence—the surviving friends are brought back together by terror. Driven by intense guilt, Lennon’s surviving twin sister, Alison, who had actually traded places with her sister that fatal night, has been living under her dead sibling's identity.The nightmare begins when the teenagers receive a chilling, anonymous text message: *I know what you did last summer*. Panic ensues as the friend group realizes someone witnessed their cover-up and is now hunting them down one by one. As the body count rises, bloody and creative murders plague the town, targeting not just the guilty teens, but also their friends and family members. paranoia fractures the group, destroying any remaining trust. Everyone becomes a suspect, and everyone has a secret. Alison desperately tries to unmask the killer before she is exposed or murdered, navigating a web of deceit involving her emotionally distant father, local drug rings, and complicated romantic entanglements.As the police close in and the psychological pressure mounts, flashbacks reveal the toxic dynamics of the teen group prior to the crash, highlighting deep-seated resentments, jealousies, and betrayals. It is eventually revealed that the cult-like town has a history of dark rituals and municipal cover-ups. In a shocking twist, the mastermind behind the bloodshed is not an outside avenger, but someone intimately connected to the twins, driven by profound betrayal, twisted familial loyalty, and a desire for absolute retribution. The killer orchestrates a final, violent showdown in the labyrinthine caves beneath the island, trapping the remaining survivors. Alison confronts her tormentor in a brutal, bloody climax that forces her to finally shed the false identity she has worn for a year. Although she survives the ordeal, the final moments of the series deliver a chilling cliffhanger, revealing that the legacy of their crime is far from over, and a new accomplice remains completely hidden in plain sight, ready to finish the deadly game.