The daughter-in-law opens a seafood restaurant, and her mother-in-law invests one million and brings people to support it, but a conflict breaks out over a king crab. Misunderstandings pile up between the mother-in-law and daughter-in-law, and only after reconciling accounts do they discover that the husband is sabotaging things behind the scenes, embezzling funds and maliciously sowing discord. Dropping their barriers, they join hands to collect evidence, recover losses, guard the restaurant, pierce through the haze of lies, and live an independent and clear-headed life.