Long Black Veil
A night of mischief goes horribly wrong when six college friends: Casey, Wailer, Maisie, Tripper, Rachel, and Quentin go exploring in an abandoned penitentiary late one night following Casey and Wailer's wedding. They get locked in and must find a way to escape. Tripper, the mastermind, manages to scale a wall to go for help while the others end up separated inside. Wailer disappears and does not resurface until remains are found over 30 years later. Casey is charged with the murder. Quentin, now known as Judith Carrigan, is the only one who could possibly help Casey, but doing so could destroy the new life she's created for herself.