Situ Yuan, the third princess of Tianqi, loved Prime Minister Pei Ji for ten years, but was sent to Beili as a hostage for three years on the grounds that he "wanted peace" and was tortured by the third prince. After she returned, she was devastated. She met Beili's close friend Ajin and wanted to escape together, but Ajin was killed by Pei Ji. Situ Yuan pretended to cater to Pei Ji, secretly used chronic poison to take revenge, regained the imperial power, and finally traveled around the world with Ajin's ashes, missing Ajin throughout his life.
