Still in his final year of high school, Jiang Nian is mistakenly bound to a bizarre "Middle-Aged Comeback System" that thinks he is already middle-aged. At just 18, he finds himself saddled with a system obsessed with KPIs and health advice, constantly inventing problems even when none exist. Between preparing for the college entrance exam and dealing with a system that is twenty years ahead of its time, Jiang Nian embarks on a hilarious and heartwarming journey of turning his life around!