Following a late-night disturbance, “Bobo” (Jean Gabin) worries he may have unintentionally caused someone’s death and subsequently finds employment in a remote and desolate area of their local harbor. His closest friend, "Tiny" (Thomas Mitchell), serves as his only connection to the outside world until he encounters the distressed "Anna" (Ida Lupino), whom he prevents from making a rash decision. Their initial relationship is strained, but they gradually begin to develop trust, much to the dismay of Tiny, who observes his own jealousy growing. As the couple decides to marry, it becomes clear just how far Tiny will go to interfere with their happiness. Gabin’s performance isn't particularly memorable, however Lupino provides a compelling portrayal of her character, and the emotional weight she carries moves beyond what is typical for female characters. Claude Rains appears as "Nutsy," but mostly remains on the periphery, as the film largely centers around Mitchell’s performance. I can’t recall another movie where the central conflict revolves around fraternal jealousy, and his portrayal becomes increasingly heartbreaking—a man radiating a sense of sadness that actually elicits sympathy from the audience. The setting itself – a gloomy port filled with debris and decaying metal – contributes to the escalating feeling of danger as "Bobo" starts to understand what's happening. The script is competent enough to provide opportunities for everyone involved, and it’s worth seeing for the pairing of Lupino and Mitchell, who have good chemistry together.

Source on TMDB