Childhood sweethearts and doctors Lin Zhi and Shen Jingchi secretly register their marriage due to an arranged union between their families. At the hospital, they are a star surgical team who work seamlessly together, but in private, they pretend to be ordinary colleagues. Despite living under the same roof, they constantly bicker and spar. While dealing with pressure from both families to arrange their wedding, they also juggle demanding clinical work. Misunderstandings from their younger years gradually resurface, while hospital gossip, gatherings with friends, and family dinners repeatedly threaten to expose their secret. From mutual wariness and constant clashes to gradually recognizing each other's true feelings, they finally resolve years of emotional knots. Through repeated adjustments and companionship, their marriage of convenience slowly blossoms into genuine, mutual love.