Se Ran learns that video evidence of Shin Duk Soo's death is on a flash drive hidden in the bag. She and Ae Ja rush to get their hands on it before Da Jung. However, Hae Il knows about it and tries to stall Se Ran from leaving, giving Da Jung and Yo Han a head start.
Yo Han finds Noel's note on her desk. He realizes she is Da Jung's biological mother and is about to take her own life. Meanwhile, Je Guk orders Sang Chul to tail Da Jung and get information from her, and Se Ran finds out where Da Jung's handbag with the USB flash drive is.
Ji Hoon decides to turn himself in for the hit-and-run accident as Da Jung advised, but Je Guk is completely against the idea. Se Ran discovers where Sang Chul left Duk Soo's phone to get repaired, so she heads to the repair shop, and Sang Chul goes after her.
Yo Han and Da Jung secretly talk about how she can get away from Chairman Wang. Meanwhile, Sang Chul exposes what he and Se Ran did together to Ae Ja, and Se Ran learns that Yo Han adopted Song Yi.
Ji Hoon is tortured by the parcels he has been receiving about Song Yi's hit-and-run accident, and this time, Se Ran receives a parcel named after Song Yi. Meanwhile, Ae Ja and Se Ran realize that Da Jung has already found her biological daughter.
Da Jung realizes that Je Guk was the one who stabbed Yo Han. Despite Je Guk's warning, Yo Han waits for Da Jung to come back to him. Meanwhile, Ji Hoon receives another package, and Noel finds her painting in the garage and remembers something about her past.
Se Ran endures prison life. However, it's too much to handle. When Ae Ja visits her, Se Ran shares her plans with her so she can overcome her situation. Meanwhile, Yo Han pleads with Da Jung that they shouldn't keep them a secret from Chairman Wang.
Da Jung gets new evidence in her hands sent by someone. The possibility that Song Yi isn't her child builds up, and she can't bear it much longer. She gets ready to sue Se Ran and requests a DNA paternity test with Song Yi.
Se Ran's mind gets blown when she sees Sang Chul and Ma Ri in front of the company with signs to protest. Meanwhile, Da Jung visits the ob-gyn where Song Yi was born and digs deeper into Song Yi's blood type. What she learns is shocking.
Je Guk appoints Da Jung as a director at Dream Food, and Da Jung becomes Se Ran's boss. Da Jung warns Se Ran that she will torment her all she can before reporting her for her crimes. Furthermore, Sang Chul visits Ji Hoon to reveal Se Ran's past.
Yo Han goes on a trip with An Na and stays away from Je Guk and Da Jung. Da Jung feels sorry for Yo Han, but she promises herself she will not get distracted by him. Meanwhile, Sang Chul is released from prison and is about to expose Se Ran.
With Da Jung's comeback after two years, everyone is in shock and pain, especially Yo Han. Yo Han cannot believe what Da Jung has become and tries to stop her, but she is determined to get back at Se Ran on her own.
After seeing Da Jung in the wedding dress, Ji Hoon falls head over heels for her and asks Yo Han for an introduction. However, Yo Han refuses. Meanwhile, Yo Han takes Hae Il's words as his chance to profess his genuine feelings for Da Jung.
With Sang Chul and Se Ran's belongings found at the park, Da Jung realizes that Duk Soo's death was not accidental. However, the evidence she has is not enough to reopen the case. Meanwhile, Noel remembers she had a daughter before she lost her memory.
Da Jung wins the competition and becomes the vice CEO of Bobaejung. Now that Se Ran lost to Da Jung, even with all the benefits she had, she feels anxious as she is not the real granddaughter. Therefore, she comes up with a backup plan in case she gets caught.
Sang Chul gets fed up with Se Ran for not introducing him to Madam Yoon. He takes the initiative and goes to Bobaejung by himself to meet her. Meanwhile, Da Jung gets lost in thought after finding a stuffed teddy bear with her mom's initials, H.I.
Da Jung and Sang Chul arrive at the courthouse to finalize their divorce. When Se Ran hears about who got Song Yi's custody, she loses her mind. Meanwhile, Hae Il introduces Ji Hoon to Madam Yoon, and Madam Yoon visits Man Seok at the columbarium.
Da Jung has a hard time accepting Duk Soo's death. As she cleans his room, she finds the memorandum Sang Chul had written and realizes the date he signed it was the day Duk Soo passed away. Infuriated by what she knows, she interrogates Se Ran for more answers.
When Se Ran and Ae Ja are about to take a load off their shoulders, they find out Yo Han is meeting the director of Sarang Orphanage. Furthermore, detectives take Da Jung to the station as they discover something at the scene.
Se Ran begs Duk Soo to bury the truth, but it only fuels Duk Soo's anger and determination to punish her.
Da Jung learns the truth behind Se Ran's revenge, and Duk Soo receives the DNA paternity test results.
Yo Han finds out Young Sik visited Sarang Orphanage, while Duk Soo takes Bo Bae's comb to compare their DNA.
Se Ran tries to frame Duk Soo as the murderer of her father, and Da Jung finds out about his past.
Sang Chul and Ma Ri search for Da Jung, who didn't return home, and find her with Yo Han, both half naked.
Young Sik and Se Ran put Yo Han and Da Jung through torment, and Ae Ja gives Madam Yoon a picture of Man Seok.
Director Yeo discovers Se Ran's deception, and Yo Han draws Young Sik to Bobaejung to uncover the truth.
Now that Duk Soo and Da Jung have failed to meet Hae Il, Duk Soo wants to look for his mother for Da Jung.
Noel decides to meet Duk Soo, and Da Jung cannot concentrate at work, thinking about meeting her birth mother.
Young Sik threatens Se Ran for money again, and Duk Soo visits Noel's office to leave a note for her.
Duk Soo goes after Noel, thinking it's Hae Il, while Miss Kim reveals the truth about Madam Yoon's son.
Se Ran's uncle threatens Se Ran and forces her to pay him money and visit his mother at the care home.
Sang Chul frames Da Jung for having an affair with Yo Han, and Man Seok's brother visits the orphanage.
Se Ran tries to fire Da Jung on the spot, but Yo Han keeps getting in her way.
Bo Bae appoints Se Ran as CEO of Bobaejung, and Se Ran warns Yo Han to keep quiet about her affair.
Se Ran tries to switch the genuine DNA testing report headed for Madam Yoon with a fake one she made.
Se Ran buys some time from the truth getting out and sneaks into Da Jung's room to stop it completely.
Se Ran gets a DNA test before meeting Bo Bae and decides to visit the orphanage where her dad grew up.
Da Jung finds out Se Ran had kept Sang Chul's baby, and Ae Ja tells Da Jung and Sang Chul to get a divorce.
Da Jung wants to divorce Sang Chul right away but hesitates to leave for the sake of her daughter, Song Yi.
Se Ran exposes her relationship with Sang Chul to Da Jung, and Da Jung can believe what she sees.
Duk Soo tells Sang Chul to end the affair and warns Se Ran he'll destroy her if she keeps seeing Sang Chul.
Duk Soo sees Sang Chul and Se Ran together, while Bo Bae gets calls from people who claim to be her son.
Yo Han starts to work as a manager at Bobaejung, and Sang Chul thinks of divorcing Da Jung.
Se Ran secretly adds something to her drink, and Song Yi witnesses it.
Se Ran returns to Korea and catches the attention of Sang Chul, who regrets ever breaking up with her.
Se Ran goes to the Philippines after seeing Da Jung and Sang Chul embrace Song Yi in their arms.
Se Ran sneaks into the hospital where Da Jung gave birth and switches their babies.
Se Ran lies to everyone that she is moving abroad, but instead, she stays close to Da Jung and stalks her.
Se Ran rushes to Sang Chul's house in anger to expose the truth about their affair and her pregnancy.
Se Ran is pregnant with Sang Chul's baby, and Da Jung decides to work for Yo Han at his food truck to earn a living.
Hae Il gets into trouble, and Da Jung happens to witness it on her way to meet Se Ran.
Hae Il drinks with Ma Ri and frees her frustration, while Da Jung faces a hurdle in buying a food truck.
Da Jung discovers she is pregnant, and Sang Chul is ecstatic. However, he has to break up with Se Ran.
Duk Soo is burdened by guilt for separating Da Jung from her mom and is eager to reunite them.
Se Ran keeps approaching Sang Chul on purpose, and Sang Chul can't push her away.
Se Ran cannot stand Da Jung and her father and decides to take revenge on them.
Face-to-face with her biological father at last, Da Jung learns the truth about her real name.
Go Eun's mother, Hae Il, leaves Go Eun and her father, Duk Soo, to find her own happiness.