Lin Qingwan has raised her daughter alone. A random act of kindness brings her into contact with the Gu family, and reveals the truth about her daughter's background: the child's biological father is Gu's CEO Graham. Facing public criticism and obstacles, Lin Qingwan upholds her kindness. Graham learns to take on his responsibilities as a father and partner, and the whole family eventually overcomes past regrets to embrace a stable, happy new life.