The police try to recover the blueprint of a newly designed submarine after it is stolen by enemy spies.
A detective teams up with a chivalrous thief to catch a Japanese spy.
During the Cultural Revolution, Xie Zhixin (Yuan Yue) learns that his son Xie Feng (Ma Xiaowei)'s lover Ulan (Zhang Xiaolei) is the daughter of his student, Lu Yan (Gao Ying), from many years ago. After watching Ulan's performance, Xie leaves in a hurry; Ulan mistakenly believes that Xie's father has scorned her because he knows that her mother is a "rightist."
