However, his life is turned upside down due to a daughter-in-law he made by chance, and the real ‘assa’ Ji-won Lim lives as ‘insa’ Kim Si-hoo. The more he falls into the life of the daughter-in-law, the more Jiwon loses her presence, and in the end, she decides to kill the daughter-in-law… Will he be able to leave behind everything he has gained as a daughter and return to himself?