Xiuzhen, a grandmother addicted to playing mahjong, leaves her baby grandson home alone, causing him to nearly drown and leaving his life hanging in the balance. Her daughter-in-law, Shen Jing, breaks down, plunging the family into an icy atmosphere. Overwhelmed with remorse, Xiuzhen later discovers that her son has been targeted by a fraud gang. Determined to atone for her mistakes, she pretends to return to her old ways and ventures deep into the gang's lair, working with the police to dismantle the entire scam operation and clear her name. After facing life-and-death trials and numerous misunderstandings, the family finally reconciles and welcomes a happy ending together.