Su Xiaoman, a modern young woman, unexpectedly travels through time and is forced by a system to win over Xie Hui, a brutal and bloodthirsty young emperor. Struggling to survive at every turn, she gradually becomes his only weakness. For her sake, he reins in his violent nature and awkwardly learns how to be gentle. But once her mission is complete, she chooses to fake her death and return home. During the ten years she is gone, he descends into complete madness. Then, when she reappears with no memory of her past, a love story spanning time and a journey of redemption unfold, revealing the cruel conspiracy behind the system.