The mod band "The Spiders" has just come back from a tour of the US and one of the members, Sakai Masaaki, is working on cutting off the skin of a tambourine he bought. The tambourine is jeweled with what he thinks are fake gems, but actually a ring of spies has used the instrument as a way to smuggle in diamonds. The beautiful spy girl (Mari Annu) sits diagonal to him, and it’s there that they first lock eyes. The spy follows the band throughout the film, trying to retrieve the tambourine from "Masa" as he’s referred to through violence or seduction.
