Ten years ago, she pulled a boy who had hit rock bottom out of despair with an anonymous letter. Ten years later, he has changed his name to Wen Siyan and become a cold-faced CTO known as the Grim Reaper. He carefully plans every move, all to get closer to her. A blind date and a fake-marriage contract bring the clearheaded, rational product manager Tang Xu and the long-planning Wen Siyan together as contract spouses, beginning a romance where love follows marriage. Workplace sabotage, provocations from romantic rivals, and a life-threatening alcohol allergy follow one after another. When her life hangs by a thread, he completely loses control. She finally realizes that every coincidence was part of his carefully orchestrated ten-year secret crush. Ultimately, she is utterly won over by his unwavering devotion, and they find their way to a happy ending as their love becomes mutual.