Helen Roberts, who's on probation, goes back to work as a waitress at Torre's Fish Palace, a San Francisco waterfront dive. The customers are low characters trying to make time with Helen and ex-rum runners trying to make a dishonest dollar. Some of the latter, including Helen's unwelcome suitor Martin Rhodes, are after a mysterious, valuable hidden "cargo"; when violence erupts, Helen finds herself innocently involved, and is soon on the run from both cops and crooks.

"She knew how to handle men...until love taught one man how to handle her!"