As Duas Irmãs

Do Eun, Yi Chul's mistress, exposes herself and their baby on her social media on purpose, and the whole world finds out about their affair. Ji Chang and Hye Won are on Soo Hyang's side for the divorce trial and try their best to comfort her. Meanwhile, Ji Chang prepares a gift for Hye Won before their wedding.

Ji Chang promises Hye Won to find her long-lost sister, Hye Ji, no matter what. Hye Won discovers Yi Chul has been embezzling company funds under a shell company for two years. Meanwhile, Do Eun is curious about Ji Chang's fiancé and wants to meet her.

Do Eun plans to meet her soon-to-be daughter-in-law and rear-ends Hye Won's car to get things started. She then buys an art piece from her gallery. To learn more about the painting, Do Eun offers to have dinner together. At the dinner, Eun notices the pendant necklace around Hye Won's neck that she once shared with her biological sister.

Do Eun realizes Hye Won is her biological sister, whom she separated from when they were young. Meanwhile, Hye Won is confused about why Do Eun left in a rush from their dinner. Later, Hye Won learns Do Eun is Yi Chul's mistress and becomes furious.

Kyung Ja appears unexpectedly and ruins Hye Won and Ji Chang's wedding while Do Eun watches from the sidelines. However, Do Eun sees Min Tae, her father, and she begins to remember the past. Meanwhile, Myung Ae can't believe the disgrace Hye Won brought to the family and scolds Ji Chang.

After ruining Hye Won's wedding, Do Eun plots another scheme to bring her down with Kyung Ja. Hye Won and Ji Chang return home without going on a honeymoon, and Hye Won even sees Do Eun in her dream. While Myung Ae gives Hye Won a hard time at home, Do Eun sends a text message to Hye Won.

Do Eun suggests to Hye Won that they meet and talk in person. Do Eun sends her a photo of her necklace to convince her that she is her younger sister, Hye Ji. Hye Won waits for Hye Ji at the mineral spring, but a man shows up instead of Hye Ji.

Do Eun becomes furious after the protest in front of the Boram Childcare Facility. Do Eun suspects Hye Won is the one responsible for the protest and calls her to meet. Meanwhile, breaking news of Yi Chul's large donation to the Boram Childcare Facility by using a shell company airs, along with Do Eun's position in the facility.