Sachiko Hanai works as a call girl at an imekura (or sexual role-play club). While waiting for her co-worker, she stumbles upon a secret meeting between a North Korean and a Middle Eastern-looking man, this proves to be a deadly day. When violence breaks out, a stray bullet hits her smack in the center of her forehead and leaves her staggering for the door. The next day she finds a strange metal can in her pocket, and after dislodging the bullet, she's suddenly able to understand foreign languages and solve complex mathematic formulas. Unfortunately, the cylinder she picked up happens to contain the finger of the American President, whose fingerprint is capable of unleashing a devastating nuclear apocalypse across the world. Will the call girl turn genius be able to stop the world's mass destruction or will it be left to the finger!