Set in the flamboyant 1930s, “This is not a murder mystery” reunites world renowned Surrealist artists, including young Salvador Dalí and René Magritte, who find themselves trapped in a lavish mansion with a mysterious serial killer on the loose.

A Yorkshire coal mine is threatened with closure and the only hope is for the men to enter their Grimley Colliery Brass Band into a national competition. They believe they have no hope until Gloria appears carrying her Flugelhorn. At first mocked for being a woman, she soon becomes the only chance for the band to win.