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.
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.
