Nine-year-old boy Liang Chuan is sensible and kind, depending on and accompanying his adoptive father Liang Yansheng. A warm encounter in a noodle restaurant makes the swallow-shaped birthmark behind his shoulder a clue to family affection. Wen Lan comes to his side following years of longing, and with everyone's help, the family searches together for the answers of the past. Liang Chuan guards family affection with sincerity and courage, also making them understand and cherish each other even more. Ultimately, love and trust converge into a new home, welcoming a warm and bright new life.