The clock is ticking... Death draws near. Emi must find out whether her nightmare is just that - a nightmare - or reality... before it's too late. Emi's life is a nightmare. The face of a drowning girl haunts her: it prevents her rest at night and does not even allow her peace during her waking life. As Emi tries to discover what her nightmares mean, she delves deeper into her long-forgotten past, stirring secrets that she would have preferred to leave unearthed. Meanwhile, the clock ticks, and Emi must race against time to find out how the girl in her dreams died... before the girl kills her.