On a rainy night in Binhai City, medical university intern Su Wan was forced to break into the world of Fu Sihan, the president of the Fu Group, in order to save her younger brother who was suffering from leukemia. A yellowed childhood photo reveals a secret entanglement from ten years ago - the indifferent young man who pushed her brother into the lake is now a business emperor with the power of life and death.
Fu Sihan signed a one-year prenuptial agreement with harsh terms: she must obey all his instructions in the name of "Mrs. Fu", while he will bear all the expenses for his brother's treatment and donate bone marrow himself. The moment Su Wan signed his name, he knew that this deal was destined to be full of humiliation and struggle.
Fu Sihan's villa is a gorgeous prison. He is cold and domineering, and regards her as a tool for atonement. However, for countless late nights, he clumsily gave her medicine when she had a fever, and forcefully protected her when she was in trouble. The provocation of a popular actress, the pressure from family forces, and the revelation of the truth ten years ago have caused this relationship that began with a contract to gradually get out of control.
Su Wan oscillates between hatred and heartbeat, and she discovers that there is unknown tenderness hidden under this iceberg: he will remember her preferences, accompany her to the amusement park to make up for her childhood, and clumsily explain "Only I can bully you" when she misunderstands. And Fu Sihan also fell into possessiveness. The contract that was originally used to atone for his sins had long since become an obsession that he was unwilling to let go of.
When childhood misunderstandings are solved, when family conspiracy comes to light, the relationship that started as a transaction has long been melted and frozen by passionate love. Fu Sihan finally admitted: "I thought it was atonement, but I have already fallen." Su Wan will also finally understand that it is not the contract that traps her, but a prison for him.
