A ridiculous night party accident caused Su Wan, who came from a humble background and was oppressed by her original family, to have a fateful entanglement with Fu Jingshen, the cold, ruthless and high-ranking Crown Prince of the Fu family. Su Wan was forced by her family to pay off her brother's gambling debts and almost married a notorious old man. In a desperate situation, she found out that she was pregnant with Fu Jingshen's child. She made a desperate move and came to find him, but was met with his suspicion and humiliation. Fu Jingshen was accustomed to disguise himself with indifference, guarding against any deliberate approach. However, after learning about Su Wan's situation and determination, he panicked, put down his body and humblely prayed, and proposed to sign a cohabitation contract to protect her and her children. Under the contract, the two started a subtle cohabitation life. Fu Jingshen used his meticulous and gentle tenderness to melt the ice in Su Wan's heart little by little and make up for the damage in the past. With his support, Su Wan gradually let down her guard and got rid of the shackles of her original family. This entanglement, which started from an accident and was tied to a contract, finally breaks down the barriers and secretly develops feelings through gentle companionship and stormy tests. The two lonely people will eventually find their own warmth and salvation in each other's protection.