Shen Yu is reborn one day before her roommate, Su Mo, uses loophole coupons to drain her family's restaurant of its money. In her previous life, the restaurant went bankrupt as a result. This time, Shen Yu sets a trap in advance and catches Su Mo red-handed, forcing her establishment to suspend operations. Su Mo repeatedly switches restaurants to take revenge, but Shen Yu gathers evidence and exposes her fraud. When Su Mo falsely accuses her, Shen Yu joins forces with other merchants to prove her innocence. Su Mo is ordered to pay compensation and sentenced to prison, while Shen Yu takes the lead in establishing a merchants' mutual-aid rights protection association.