Yan Lu, pursued by enemies, accidentally kidnaps Jian An, the adopted heir of the Jian family. After failing to escape, Yan Lu becomes Jian An's reluctant bodyguard. Their dynamic shifts as Jian An, intrigued by Yan Lu, playfully torments him. A fight reveals a birthmark on Yan Lu, hinting at deeper secrets. When Jian An loses his memory, he relies on Yan Lu, leading to a growing bond between them. However, as Jian An's memories return, he fears the truth will come out, unaware that Yan Lu understands everything and only wants to protect him.