Prince Qi Jin took in the emperor's younger brother Qi Sheng, who was bullied because his mother and concubine were framed. As the two grew up, Qi Jin discovered that Qi Sheng had different feelings for her, and Qi Sheng gradually couldn't control his feelings. Finally, the night before Qi Sheng was sent to fight, the two took an irreversible step, and the situation slowly spiraled out of control...