A top secret British military spy ship exploded in Greece, sinking to the bottom of the sea with a powerful transmitter on board (said to be capable of disabling the entire Polaris missile system). At this time, not only the British military, but also spies and terrorists from all over the world began to stir. So 007 Bond (Roger Moore) was dispatched, and his task was to destroy the transmitter as soon as possible. At the same time, Mr. Havelock was unfortunately assassinated while searching for the device, and his daughter Melina (Carole Bouquet) tried to do everything possible to avenge her father. Bond persuaded Melina to help him dive into the seabed and retrieve the transmitter from the wreck. Unfortunately, the two surfaced and were captured by the enemy...