Secret Ava has had a crush on CEO Ethan for ten years. Due to a family crisis, they signed a secret marriage contract and only act as colleagues in public. At work, Ava suffers from harsh clients, jealous coworkers and rivals. Ethan always stands firmly by her side to protect her. Later, her diary hiding ten years of secret love is discovered. They clear up all misunderstandings and break the estrangement of this interest-based marriage. They face their true feelings, stand together through family conflicts and public rumors, and finally fall in love with each other to have a happy ending only belonging to them.
