The ambitious and successful lawyer Do Hae-gang (Kim Hyun-joo) and her husband, Choi Jin-eon (Ji Jin-hee) have a dysfunctional relationship. They lose their child and Jin-eon starts an affair with a much younger girl, Seol-ri (Park Han-byul). Dokgo Yong-gi is Do Hae-gang's unknown twin sister. After the couple divorce, Hae-gang gets into a mysterious car accident and loses her memory. Baek Seok (Lee Kyu-han), mistaking Hae-gang as Yong-gi, saves Hae-gang and makes her live as Yong-gi. Hae-gang becomes Baek-seok's fiancé and lives with his family. What will happen when Jin-eon and Hae-gang meet again? Will the couple be able to go back to how they used to be before?
Cast
Main characters
Kim Hyun-joo as Do Hae-gang (Birth Name: Dokgo On-gi) / Dokgo Yong-gi
Episodes 11 and 12 were postponed due to the airing Chuseok special broadcast. Episode 11 was aired on 3 October 2015, and episode 12 was aired on 4 October 2015.
The broadcast of episode 22 scheduled on 8 November 2015 was cancelled due to the baseball match.
The broadcast of episode 23 scheduled on 15 November 2015 was cancelled due to the baseball match.
Episode 23 broadcast on 21 November 2015 was delayed by almost 50 minute due to a baseball game.
The broadcast of episode 34 scheduled on 27 December 2015 was cancelled due to the SBS Gayo Daejun.
The broadcast of episode 38 scheduled on 16 January 2016 was cancelled due to the SBS Sports 2016 Olympic qualifier game between South Korea and Yemen.