Dad remarries, and Lu Zeyan gets a step-sister, Su Niannian, whose obedience feels fake. She only eats plain white rice, takes cold showers, and never opens her suitcase—until he catches the bruises on her arm. Beneath her mask lies a girl driven to the edge by an abusive father. From rooftop pacts to courtroom showdowns, from city-wide searches to guarding the college entrance exam, this non-blood-related brother and sister finally turn your home into our home.