In the late Northern and Southern Dynasties, the daughter of Chen Guo's Grand Tutor was forced to marry the Great Zhou Emperor Yuwen Yong as a substitute princess, and a series of anti-Mary Sue and anti-routine stories happened between her and the puppet emperor of the Great Zhou. The powerful minister Dugu Jin held the imperial power and was determined to train his legitimate son Dugu Cheng as the successor of the Great Zhou, and turned the current emperor Yuwen Yong into a puppet emperor. Dugu Cheng, who was lonely, cold, silent and introverted, fell in love with Tang Wan, the loyal spy of the emperor. Faced with the kingdom and love that his father had calculated all his life, Dugu Cheng was in a difficult choice.