While travelling to the countryside of England by train, the repressed and shy Lina McLaidlaw meets the reckless playboy Johnnie Aysgarth crashing her first class cabin with a third class ticket. When they meet each other again, Johnnie overhears a conversation of her father about her heritage and courts Lina who immediately falls in love for him. They get married and when they return from their fancy honeymoon, Lina discovers that Johnnie is a broken gambler that borrows money from his friends to live in a high standard. Then she finds out that he is also a liar, and after receiving his old friend and partner in a real estate business, Beaky, in their home, Lina believes that Johnnie intends to kill Beaky. However, they decide to travel to Paris to dissolve their partnership. When two detectives come to their house to investigate the mysterious death of Beaky in Paris, Lina believes Johnnie is the murderer, and she will be his next victim.