William Reardon (Melvyn Douglas) leaves his cushy job with the District Attorney to open up a private detective agency. But when things get tough, he goes back to the D.A. office, leaving his wife Sally (Joan Blondell) to close up the agency. When a woman comes in with what seems like an easy case, Sally takes it on herself, trailing the woman who may be cheating with the client's husband. When the client's husband is found murdered, however, Sally tries to solve the case on her own, while William tries to solve it for the D.A.