In the ruthless life of Ye Xiaosheng, the number one killer of the Blood Sacrifice Hall, every mission is like walking on the edge of life and death.However, fate always seems to play tricks on him, allowing him to meet a girl who changed his life - Lin Mengchen while performing a mission.

On that day, Ye Xiaosheng received the task of assassinating the unjust businessman Mr. Huang.When he kicked open the door of the Huang family, it happened that the Huang family held a ghost wedding ceremony.He didn't hesitate for a moment and quickly started killing.However, when he was about to leave after completing his task, a knocking sound from the coffin caught his attention.He looked back and found a stunning woman - Lin Mengchen.

Facing Lin Mengchen who had nowhere to go, Ye Xiaosheng showed a tender side and took her in, treating her like a brother and sister.As time passed, Lin Mengchen gradually grew up under the care of Ye Xiaosheng and became a tall and graceful girl.The emotions between them also slowly heat up in their daily lives.

One night, Ye Xiaosheng sent Lin Mengchen to school, and the two agreed to go to Pingqiao to watch the lanterns together in the evening.When night fell, Ye Xiaosheng specially prepared her favorite osmanthus cake for Lin Mengchen and stood on the bridge waiting.When he heard Lin Mengchen's call, he couldn't help but smile. He watched her happily eating the sweet-scented osmanthus cake, his eyes full of doting.When the two were shopping, they were even misunderstood as a young couple, which made Lin Mengchen run away shyly, while Ye Xiaosheng chased after him with the child-giving doll given by the stall owner.

However, the shadow of fate once again enveloped them.Lin Mengchen's original name is Yueniang, and she is the daughter of the Lin family.When the Lin family was wiped out, Cao Fang's daughter also died among them. In order to survive, Yueniang changed her name to Lin Mengchen.When Ye Xiaosheng received the signal and learned that Cao Fang was the culprit of the Lin family's destruction, he went out to hunt Cao Fang without hesitation.

During the pursuit, Lin Mengchen accidentally heard the sound of fighting, and she immediately entangled Ye Xiaosheng, allowing Cao Fang to escape.This incident complicated the relationship between Ye Xiaosheng and Lin Mengchen.The trust and emotions between them appear fragile in the face of the truth that the Lin family was wiped out.

However, it was this series of twists and tribulations that allowed Ye Xiaosheng and Lin Mengchen to understand each other more deeply.They began to work together to find a way to restore the reputation of the Lin family, while uncovering the conspiracy behind Cao Fang.In the process, their relationship was sublimated, and the initial relationship between brother and sister gradually developed into a deep love.