After the death of the paranoid emperor Tiberius, Caligula, his heir, seizes power and plunges the empire into a bloody spiral of madness and depravity.
Following the death of her uncle, Elisabeth returns to her family's castle for the reading of his will. She is informed of legends about the castle's ghost and experiences erotically charged nightmares, before being kidnapped by a hooded figure and tortured in the dungeon. Meanwhile, her boyfriend Jack suspects a plot to gain Elisabeth's inheritance and begins his own investigation...
A young man becomes obsessed with Byleth, the demon of incest, and it leads to an unhealthy infatuation with his sister.
