When Bradford Galt (Mark Stevens), a tough private investigator, realizes that he's being followed, he confronts his assailant, a shifty fellow named Fred Foss (William Bendix). Galt's encounter with Foss leads to a web of intrigue involving prosperous art collector Hardy Cathcart (Clifton Webb) and his young wife, Mari (Cathy Downs). Soon Galt is in over his head -- but luckily for him, his tenacious secretary, Kathleen Stewart (Lucille Ball), is on hand to help him out.