Hoping to update his chapter on modern slang, encyclopedia writer Professor Bertram Potts ventures into a chic nightclub. Inside, he meets the snarky burlesque performer ''Sugarpuss'' O'Shea . Fascinated by her command of popular jargon, Potts invites her to stay with him. But, unknown to Potts, she is the fiancée of a mobster and wanted by the police. In the ensuing mayhem, Potts must stay on his toes or be swallowed up by bigger fish.