Independent designer Wang Bing meets Huo Chen, a mysterious researcher who proposes the hardcore condition, "If I sacrifice myself, you remarry," during a blind date, and the two have a flash marriage. After marriage, facing her ex-boyfriend's sneers and workplace difficulties, Wang Bing fights back domineeringly with her superb professional skills; at the same time, she gradually discovers that Huo Chen is actually a top submersible pilot for the national deep-sea scientific research team. Through repeated partings and life-and-death tests, the two go from living together as companions to depending on each other through life and death. In the end, Huo Chen gets injured and retires during a limit rescue, and the two guard the rest of their lives with the most ordinary posture.