London, 1960. Laura Quinn is the lone female executive at London Diamond Corporation. She is frustrated as her talents are rarely acknowledged and her less-experienced male co-workers are promoted ahead of her. She is shocked, but intrigued, when the mild-mannered night janitor, Mr. Hobbs, approaches her with a daring but simple plan to steal a handful of diamonds from the vault. Laura agrees to help, but she is soon in over her head. And it is not long before insurance investigator Mr. Finch...