If Edward G. Robinson thought he'd get away from tough-guy roles by moving from Warners to MGM, he was sorely mistaken. Robinson plays the editor of a 1920s tabloid newspaper, compelled to accept financial aid from a gangster (Edward Arnold). Defying his "unholy partner," Robinson adopts an editorial stance in direct opposition to the gangster's activities. The crook is less upset by this than by the fact that Robinson's star reporter (William T. Orr) is romantically interested in the crook's girlfriend (Marsha Hunt). When Robinson tries to expose the gangster's insurance racket, the young reporter is kidnapped. Robinson kills the crook, then covers his tracks in noble fashion by participating in a suicidal airplane test flight. Unholy Partners manages to keep its multitude of plot threads in order, resulting in one of Edward G. Robinson's most solid vehicles.