A bar-restaurant owner by profession, Bai Lang finds himself facing his most dreaded fear when his sister drags him to the dentist to get treated for his toothache. At the clinic, Bai Lang is assigned to the cold yet charming Jin Xun An, the head dentist who seems rather reluctant to examine Bai Lang.

Upon learning Jin Xun An had been emotionally hurt in the past, Bai Lang becomes adamant about uncovering the reason behind it. Meanwhile, Big A, the youngest dentist at Jin Xun An's clinic, finds himself crossing paths with a peculiar patient who has apparently been assigned under him.

In a strange twist of fate, a man who was once in a relationship with Jin Xun An suddenly makes a reappearance in his life. Will this "lover from the past" become an obstacle to the growing affection between Jin Xun An and Bai Lang?

The easy relationship between Jin Xun An and Bai Lang kickstarts their coupled life together, but Bai Lang's sister feels worried about the developments.

Jin Xun An decides to take Bai Lang home to finally meet his family. Facing Jin Xun An's stern father, does Bai Lang have what it takes to win him over?