In order to escape family and emotional difficulties, Mu Nanyan entered into a "one-year hidden marriage contract" with Lu Yiran, who needed to secure his inheritance rights. In the early days, the two did not trust each other and had frequent misunderstandings, and their relationship remained at the cold level of "win-win cooperation." After getting along with each other after marriage, Lu Yiran gradually revealed the softness behind his dark shell, and Mu Nanyan also gradually changed under Lu Yiran's hidden protection. External conflicts instead became an emotional catalyst, making the two of them face up to their care for each other.