Miao Tan, who worked as a reconnaissance soldier in a naval unit, was demobilized and returned home. The mother happily slaughtered chickens and fish, preparing to clean up the dust for her son. Unexpectedly, an unharmed chicken broke free from her hands and flew into the neighbor's house. Miao Tan bumped into it, frightening Xia Shilian, who was taking a shower. The frightened cries alarmed the neighbors and attracted the police. Miao Tan tried his best to eliminate the misunderstanding. Miao Tan discovered that his sister Miao Lan has been always looking worried in recent days. When asked, he found out that her brother-in-law often interacts with a woman at work. The sister is worried that her brother-in-law cannot withstand the temptation, so she is worried. Miao Tan happily accepted the task of helping his sister investigate the whereabouts of her brother-in-law. The next morning, Miao Tan went to his brother-in-law's workplace - "Mimi" Toy Development Company to "carry out the task". Curious Xia Shilian also secretly followed Miao Tan, but was soon discovered by Miao Tan. The two young people met and became friends from then on. A few days later, Miaotan indeed obtained conclusive evidence that her brother-in-law Tong Xin and female assistant Bo Yun were in a good relationship. Miranda spilled vinegar cans and was going to the toy company to make a scene. Miao Tan tried his best to stop him, but was locked inside by his sister. Miao Tan had no choice but to climb walls and jump off buildings, but was unexpectedly taken into the public security bureau by the police. Originally, the reconnaissance officers of the Public Security Bureau had already noticed him and believed that he possessed the qualities of a public security officer, preparing to recruit him as a member of the Criminal Investigation Team. Miaotan understood the reason for his "conclusive evidence" from the director's actions and sounds of eating noodles, and ran out with his legs up. He rushed to the toy company with his sister first, found Tong Xin, and told the truth. At this moment, Miaolan arrived and Miaotan quickly tricked her sister into entering the elevator. At this moment, Bo Yun heard someone mention his name and walked out of the room, warmly inviting Miao Tan to visit the company. At this moment, the elevator door opened and Miao Lan pulled Bo Yun into the elevator. Miao Tan saw that Bo Yun had been robbed and quickly grabbed Tong Xin to chase after him. Miao Lan was determined to ask a clear question, so she pulled Bo Yun into the company's warehouse and closed the door. Now the warehouse keeper was in a hurry, calling for many people and using ambulances, fire trucks, and cranes to organize rescue operations. Miao Tan came up with a quick idea and crawled into the warehouse through the skylight, explaining the truth to his sister and Bo Yun. The two of them cleared the misunderstanding. Through sincere and friendly laughter, everyone deepened their understanding and enhanced friendship.