Ameku Takao is a genius doctor with a knack for solving all kinds of difficult cases. When a man with blue blood is brought to Tenikai General Hospital—where Takao is the vice-director—after having his leg bitten off by a large beast, she starts investigating the intriguing case with the aid of her colleague, Takanashi.

"Do you believe a video can be cursed?" A girl walks in front of a train after watching a particular video and is subsequently admitted to a psych ward. Takao is the only one who believes her twin sister when she says it wasn't a suicide attempt but the result of watching a cursed video, and the genius doctor sets about investigating.