The Line-Up.

Bob Curtis (William Gargan), the youngest member of the New York City plain-clothes squad, is assigned to help Detective-Sergeant Doyle (Paul Hurst) uncover the people behind a number of fur robberies. Peggy Arnold (Marian Nixon), a beautiful girl, comes under suspicion, but Bob, convinced of her innocence, adopts a desperate plan to clear her and round up the real criminals.