"Penthouse 2" episode 2 follows the event that Oh Yoon Hee (Eugene) returned to Korea after 3 months of being released from prison as the wife of Dr. Ha Yoon Cheol. The appearance of both made Cheon Seo Jin (Kim So Yeon) extremely angry and jealous. Dr. Ha was not as weak as before, he could turn on Joo Dan Tae any time. Their quick marriage makes people doubt the truth. Back this time, Ha Yoon Cheol and Oh Yoon Hee run an overseas company and are ready to join the fight for revenge.
Oh Yoon Hee and Ha Yoon Cheol have moved into Hera Palace as JohnBio. Their presence made the quarrels between Seo Jin and Dan Tae even more. Although angry, the contract signed made Seo Jin unable to kick them all away.
Cheon Seo Jin's throat problem is also becoming more serious and there is a risk of losing his voice if he continues to sing. She was angry because her voice was criticized by the press, but also bitterly watched Yoon Hee join the Hera Club. Dr Ha used her shares in the company to share with other club members and won the right to join. In that situation, Seo Jin chose to withdraw from the club, although Dan Tae protested.
Thanks to Yoon Hee, Ha Yoon Cheol can regain glory, both lives are maintained by the partnership contract. However, the feelings of both parties still have times beyond the limit of the contract because of their past. To hide his injured voice Seo Jin finds a replacement lip-syncing. The contract was quickly signed with a large sum of money, and Seo Jin's lip sync plan began.
Cheon Seo Jin lip-synced was Park Young Ran, but was later disguised by Oh Yoon Hee. Oh Yoon Hee had surgery on her throat to regain her voice. Yoon Hee's revenge plan is meticulously executed by Logan step by step. Standing behind the scenes, but Yoon Hee's aura is still the same as before, making Seo Jin surprised. After learning that the person lip-syncing for him is Oh Yoon Hee, Cheon Seo Jin must obey Oh Yoon Hee.