Situ Yuan, the third princess of Tianqi, loved Prime Minister Pei Ji so much that she once risked her life to save him in the snowy mountains, but Pei Ji mistakenly recognized Lin Wanru as her benefactor. In exchange for Lin Wanru, Pei Ji was tired of the princess's entanglement and sent her to Beili to suffer three years of torture. Only Ajin was her support. After returning home, the truth was revealed. Pei Ji was filled with regret and tried to make amends, but he ruthlessly killed A Jin who wanted to elope with her. Situ Yuan was filled with hatred, pretended to be obedient to gain trust, used Pei Ji's hand to avenge his enemies, secretly assisted the little emperor in seizing power, and used slow poison to end Pei Ji. After the dust settled, she returned to the imperial power and wandered around with Ajin's ashes for half her life. Finally, she reunited with Ajin before her death.
