Arthur and Marcel, two firemen, keep boredom at bay by improvising on stage, one on a keyboard the other on drums, tunes, poems and songs. Carol arrives, in search of her lover Armand. Accompanied by the musicians, she sings of her strange loves.

A lonely and unsociable man is spying on customers in a department store in Geneva. He gets his eyes on a gorgeous creature with a musical instrument.

As he sets off for the countryside outside Geneva a taxi-driver hears a gunshot and notices a shadowy figure slipping away from the scene. So begins a series of strange incidents.