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In the rapidly changing Seoul. Sujeong, Jeongsu, Beomsu, and Miwon live with different concerns and dreams. Sujeong is tired of her repetitive work life, dreams of a new life, quits her job, and starts her own online shopping business. However, starting a business is not as easy as you think. She is having a hard time dealing with various difficulties and malicious comments, but her husband Beomsu's reaction makes it even more difficult to make corrections.
Beomsu, a patent attorney who writes patent specifications for large corporations, is exhausted from dealing with large corporations from low perspective. Moreover, the wedding is about to happen! The stress is growing as if it's about to explode, and Beomsu's mind is too exhausted to take care of his lover and is focused on work at work.

Sujeong and Beomsu first met at the mural club. When they fell in love, they only saw each other, but after marriage, Sujeong becomes frustrated because Beomsu is not only not her ideal type, but also does not understand her feelings, and Beomsu feels disappointed by his wife who does not recognize his sacrifice and patience.
Meanwhile, Sujeong discovers a machine that changes a person's personality! He decides to use Jeongsu's machine to change Beomsu. It was expected that the machine would increase Beomsu's empathy, but the relationship between the two becomes complicated due to unexpected results!
Sujeong tries to return Beomsu to his original state by resetting the machine, but the machine does not work...! As Jeong-su and Sujeong go through confusion and twists and turns to return Beomsu to his original state, they become a team and begin to find the true meaning of love... In the end, will they be able to restart the love they ruined with their own hands?