Season 1 of One the Woman premiered on September 17, 2021.

Yeon Ju is an elite prosecutor who started from the bottom. Although known as the best in corruption investigations for the Supreme Prosecutor’s Office, she suffers amnesia after a car crash when chasing a suspect. As she wakes, she finds herself being Kang Mi Na, the daughter-in-law of the conglomerate Hanju Group. Before her disappearance, Mi Na was a troublemaker born out of wedlock. Now sitting in her position, Yeon Ju is not able to hide her rough and outspoken nature. She then meets Seung Wook, a conglomerate who visits his first love Mi Na to reveal the truth of his father’s death.