Detective Kogoro Akechi is faced with a peculiar murder case involving forgeries of classic pornographic artworks.
An ivory ape escapes from a freighter and makes its way to Bermuda. Two anthropologists want to save it, but the local authorities hire a big-game hunter to track it down and kill it.
Karate expert Katayama (Takeda) investigates the robbery of a bank in Hokkaido, where an apple seed left at the scene holds the answer to the robbers' whereabouts.
