On the cusp of college, Riley March and her friends head to the decadent Palm Key Island for an unforgettable end-of-summer party. Amidst the allure of pristine beaches and a whirlwind of nightlife, each teen harbors personal secrets, from veiled pasts to unspoken affection. But the sun-soaked getaway darkens as they discover links to the unsolved death of a peer, and a hurricane seals them off from the world. Trapped, they are hunted by a shadowy figure, turning their sanctuary into a slaughterhouse. To survive, Riley must unravel the web of lies amongst her friends before the killer claims them all.