The movie benefits from solid performances by Joan Crawford and Jack Palance in this shadowy story centered on aspiration and deception. Crawford delivers a noteworthy portrayal of a playwright past her prime who eliminates Palance's involvement in one of her works. During a train trip, their paths cross once more, initiating a series of events where he gains favor with her and ultimately marries her. It’s not long before it becomes clear that Palance is working alongside Gloria Grahame, both having designs on his new wife’s substantial wealth. Crawford's declaration that she intends to donate a large portion of her money to charitable causes accelerates their scheme, but she uncovers their plot and formulates a plan in response. The film maintains suspense throughout, remaining consistently engaging and tightly paced, with an excellent musical score by Elmer Bernstein.

Source on TMDB