Raphael, a restaurant mandolin player with a limp, a father to support, and a lot of debt, accepts a job offered by his friend, Giardino, to play a serenade under an apartment window at the behest of a mysterious blonde. As he’s playing, a man high up on a balcony is pushed to his death. Raffaele is compelled to conduct his own investigation and becomes embroiled in a mystery involving a macabre secret...