Midnight on the River Styx

On the day Mia is diagnosed with Dissociative Identity Disorder, her longtime crush Cole confesses his love and proposes aboard a chartered cruise ship, surrounded by his wealthy family and friends. His parents welcome her warmly, unaware that a third personality lurks within her: the Rainy Night Butcher, unleashed the moment she touches rainwater.

As the week-long voyage begins, a chilling rhyme echoes through the ship at midnight, and the number of living passengers starts to dwindle. Cole locks her out, calling her a psycho, and Mia wakes with no memory of the missing hours. Bloody handprints and drag marks lead toward the ocean, and when she counts the guests at breakfast, one is gone.

Something aboard is hunting them all, and Mia cannot tell whether the killer is someone else or the part of herself she cannot remember.