Passerby No. 1 Zhang Qi has a gentle personality and is currently a trailer horse in a university research laboratory. He is in a state of numbness where he is overwhelmed by literature every day and has forgotten how to shed tears. As for the child of the second passerby Wang Hanyi, who is the tutor of the research laboratory, he is a scumbag who cannot inherit his father's legacy at all. By chance, these two passers-by suddenly discovered the secret behind the laboratory, so they successfully transformed from passers-by into unlucky lovers, and began to clean up the baskets they had made with tears and snot.