On the first day of her return home, Shen Jiayi accompanies her pampered mother, Jiang Hua, to pick up her younger brother, Shen Jiarui, from kindergarten. However, as soon as they arrive at the entrance, a lavishly dressed woman slaps Jiang Hua, claiming to be Shen Jiarui's biological mother and publicly humiliating Jiang Hua as the mistress who interfered in her marriage. Without a second thought, Shen Jiayi slaps Lin Man back to defend her mother's honor. What seems to be an ordinary dispute over identity unexpectedly uncovers a shocking conspiracy involving impersonation and stolen identity.