Li Xufan, a recent architecture graduate, adopts an abandoned loyal dog and names him Smile. Smile's life is full of hardships, and after enduring many trials, he is eventually sent to a dog-training center. Thanks to his outstanding performance, he is named the "King of Dogs" and regains his dignity. Meanwhile, Xufan's talent begins to shine at his company, and through hard work, he realizes his value in life. This drama tells a heartwarming story through sincere emotions.