Mizumori and Aoyagi drive a Cadillac to Roppongi for the purpose of picking up girls. When the Roppongi gals saw the extremely anachronistic Cadillac, they laughed and left. When Mizumori starts driving again, he spots a nice woman, Chikako Aoyama, who is trying to stop her taxi.

To a detective, a woman recounts how she escaped from a killer in a hockey mask. The killer had followed her and her boyfriend to a cabin for the summer...