Set in Shanghai from 1931 to 1932, it tells the story of Shen Zhiyan and Su Wan from their acquaintance and love to going through hardships and finally staying together. The two made a marriage contract through their elders, and their relationship quickly warmed up as they got along, and they planned to get married. However, the Japanese army attacked Shanghai, Shen Zhiyan's business was affected, and he was threatened by the Japanese army to cooperate. Su Wan misunderstood him as a traitor and broke up with him. Later, Su Wan learned that Shen Zhiyan was providing intelligence for the underground party, and the misunderstanding was solved. Shen Zhiyan left Shanghai to perform a mission, and the two delivered letters through a tree hole. After the war, Shen Zhiyan returned, the two got married and had children, and lived a happy life. However, Shen Zhiyan's old acquaintance Lin Ruowei appeared and caused many troubles. She even faked her pregnancy and framed him, causing Su Wan to divorce and leave in order to protect her family. Although Shen Zhiyan found out the truth, he failed to keep Su Wan.
Intention: troubled times