The Penthouse

Yoon Hee's daughter dreams to be a classical singer. Despite her mom's disapproval, she's a feisty middle school student who pursues singing. One day, she visits the most famous soprano in Korea, Cheon Seo Jin. She wants to take her lessons and pleads her to accept her. Right when Seo Jin was astonished to hear her voice, Yoon Hee barges in, and the two meet unexpectedly.

All of Hera Club's middle schoolers aim to top the entrance audition to Cheong Ah Arts High School. Everyone busily takes their lessons and works hard and so does Ro Na, Yoon Hee's daughter. The big day arrives and everyone patiently waits for the results. A surprising name tops the list of successful applicants. It's an unheard girl named Min Seol A.

Seo Jin urges Seol A to sign a paper saying that she’ll give up her acceptance to Cheong Ah Arts High. Seol A doesn’t back down and firmly states how she’ll attend the school no matter what. On top of that, Seol A also mentions how she knows about Seo Jin and Dan Tae’s secret illicit love affair.

Due to Seol A’s death, Ro Na, the first on the waiting list of Cheong Ah Arts High automatically gets accepted. Unlike Ro Na’s jovial heart, Yoon Hee is confused and nonplussed at the news. She can’t remember what happened the day she went to Hera Palace.

Files of Hera Club kids harassing Seol A is spread online and the Hera Club parents find ways to circumvent the situation. They decide to shift the attention to Yoon Hee and make sure Ro Na is suspended from school. However, an unexpected man stands up for her at the emergency parent meeting.

Su Ryeon visits Congressman Cho to reveal the truth behind the countless orphans who were adopted but deported back. The two get in a fight as the discussion heats up and Mr. Yoon accidentally kills Congressman Cho by trying to protect Su Ryeon. Right then, the doorbell rings and Yoon Hee appears.

Dan Tae and the residents of Hera Palace prepare a proposal for Seo Jin. However, police officers barge in and arrest Dan Tae as the murderer of Su Ryeon. While Yoon Hee turns herself in, she runs into Dan Tae and Seo Jin at the police station. Now that Dan Tae is a new suspect, other residents also start to believe that he killed his own wife.

When Yoon Chul introduces Yoon Hee as his wife, everyone gets shocked especially Eun Byeol. Seo Jin can’t stop thinking about Yoon Chul and it leads Seo Jin and Dan Tae to have a huge fight. Meanwhile, the doctor warns Seo Jin not to sing for awhile, but she can’t give up on her concert as it can damage her reputation.

Seo Jin is shocked to find out that Yoon Hee sang for her instead of Young Ran. The more Yoon Hee tries to bring Seo Jin down, Seo Jin feels insecure. She gets mad at Secretary Do and tells him to find a way to stop her. Meanwhile, Dan Tae also notices that Seo Jin is hiding something from him and questions Secretary Do to discover her secret.

Out of the blue, Yoon Chul visits Seo Jin at the hotel where she’s supposed to meet Dan Tae. As Dan Tae arrives, Seo Jin quickly hides Yoon Chul in the closet. Meanwhile, Ro Na comes back to Cheong A Arts High School and Ma Ri gets furious after finding out that her daughter, Jenny is being bullied by Seok Kyung and her friends.

Seok Kyung threatens Seo Jin with a secret she claims to know about her for the grand prize given at the Cheong A Art Festival. Ma Ri flips out on the parents who bullied Jenny and warns them she won't back away until everyone involved gets punished. Meanwhile, Seo Jin finds her mother and sister in her office with a non-disclosure agreement and tells her to step down from being the director.

A janitor who found Ro Na on the staircase runs into the auditorium, screaming when Seo Jin announces the grand prize winner of the Cheong A Art Festival. Ro Na goes unconscious and Yoon Hee suspects Eun Byeol. When Seo Jin realizes that the culprit was Eun Byeol, she goes back to school to find the trophy in Eun Byeol's locker and runs into Yoon Hee and Ma Ri.

Finally, Su Ryeon spends a pleasant time with her kids, Seok Hoon and Seok Kyung. However, Seok Kyung is not happy how Su Ryeon and Seok Hoon are overly generous to Ro Na. The newlywed couple, Dan Tae and Seo Jin, go through a tough time adjusting to prison life, and they try their best to find a way to get out from there with their money and power. Meanwhile, Su Ryeon witnesses Logan's death right before her eyes, and she strongly believes that it was done by Dan Tae.

The moment Seo Jin is released from prison, she visits her daughter, Eun Byeol, but Eun Byeol avoids her. Therefore, she decides to retrieve everything back from Dan Tae and her stepmother. Meanwhile, on the day of the performance test, students are getting ready at the examination hall for Seoul University of Music, and Seok Kyung relays a shocking message to Jenny just before the test.

Su Ryeon stops Jun Ki from shooting Dan Tae at the restaurant since Seok Kyung was with him. Jun Ki finally meets Su Ryeon and tells her the truth behind Dan Tae’s real identity and Logan’s death. To take his revenge, Jun Ki meets everyone around Dan Tae. Meanwhile, Hera Palace residents suspect Yoon Hee of taking Logan’s 10 billion dollars which he received as an inheritance under Seol A's name.

Yoon Hee straight away notices that Dong Pil was hiding something for Dan Tae. Since Yoon Hee is searching around to find the truth behind Dan Tae's crime, Dan Tae decides to get rid of her by using his people. Meanwhile, Ro Na and Seok Hoon try to help Eun Byeol as Bun Hong was getting more and more obsessive over her.

After discovering Oh Yoon Hee's body, Yoo Dong Pil falls victim to Joo Dan Tae and drops to his knees, begging for his life. As a result, he gets told to get rid of Oh Yoon Hee's body. Meanwhile, due to Joo Dan Tae's scheme, Jin Bun Hong holds an emergency press conference claiming that Oh Yoon Hee kidnapped Ha Eun Byeol.

Seo Jin becomes the director at the Cheong A Arts Center. Later, Eun Byeol wakes up at the hospital, and despite the good news of her getting into Seoul National University, she becomes frantic as she accuses Seo Jin of killing Oh Yoon Hee. Meanwhile, Ma Ri vows to help Su Ryeon takedown Joo Dan Tae as Su Ryeon figures out what Yoon Hee wanted to mention before she died.