Protagonist Qian Duoduo accidentally time-traveled into the Full of Joy Siheyuan, and as soon as he opened his eyes, he was stepped on by Shazhu. Just because Qin Huairu, in order to calculate benefits, instigated Qin Jingru to frame Qian Duoduo for forcibly occupying her. Yi Zhonghai took the lead, uniting everyone in the courtyard to collude in making false testimonies, and Shazhu took the opportunity to make trouble, wanting to force Qian Duoduo to hand over his property, job, and money, and drive him out of Beijing. Facing the entire courtyard's joint framing, step-by-step coercion, and scheming villains behind his back, Qian Duoduo no longer endured, resisted and stabbed Shazhu, rushed out of the Siheyuan, and resolved to go to the city to file a complaint, making this group of scheming neighbors pay the price.