Devil and the Deep

In North Africa, submarine commander Charles Sturm is insanely jealous of any attentions given his beautiful wife Diana, although she is innocent of infidelity. His violent rages against Pauline stem from a brain disorder. Due to his suspicions, he has his first officer Jaeckel transferred. After a terrible fight with her husband, Diana runs into the street at night and mingles with the native crowds. She meets a stranger who buys her perfume, and they fall in love, unaware of the other's identity. The next morning, the commander introduces Diana to his new first officer, Lieutenant Sempter, the man with whom she had spent the night. The commander immediately suspects the two and confirms his suspicions when he detects Diana's new perfume on Sempter's handkerchief. Diana goes to the submarine to warn Sempter of her husband's volatile temper but Sempter thinks she exaggerates. After confronting his wife and Sempter, the commander has the submarine submerge and then sabotages their maneuvers so the submarine collides with a ship and is knocked to the ocean floor, out of commission. The commander then sabotages the communications device. Diana proves to the crew that the commander is insane and Sempter takes control. He manages to save Diana and the crew by flooding the submarine and having everyone swim out through the buoy hatch. Sempter exits after a struggle with the commander, who, unable to open a door, drowns with the submarine. Later, a court finds Sempter guilty of conduct unbecoming an officer because of his relations with Diana. Diana waits for him outside the court and they reaffirm their love for each other. (official distributor synopsis)