Hit man Philip Raven, whos kind to children and cats, kills a blackmailer and is paid off traitor Willard Gates in hot money. Meanwhile, pert entertainer Ellen Graham, girlfriend of police Lieut. Crane (whos after Raven) is enlisted a Senate committee to help investigate Gates. Raven, seeking Gates for revenge, meets Ellen on the train; their relationship gradually evolves from that of killer and potential victim to an uneasy alliance against a common enemy.