Five-year-old Lu Tiantian is recognized and brought back home. Before going abroad, her parents leave one million in living expenses, which is managed by her older brother Lu Zihao. However, Lu Zihao fabricates lies about overseas exchange rates, misappropriates and squanders his sister's living expenses, and tricks Tiantian and the adopted daughter Yuanyuan into living frugally on sparse porridge. The parents return home early, and the lies are exposed. Lu Zihao accepts his punishment, learns to take responsibility, slowly grows through repeated trials, learns to protect his two younger sisters, and understands the true meaning of trust and love among family members.