Season 0 of The Penthouse premiered on January 12, 2021.

Season 1 of The Penthouse premiered on October 26, 2020.

The residents of Hera Palace, a luxury penthouse apartment with 100 floors, have many secrets and hidden ambitions. Sim Su Ryeon, who was born into wealth, is the queen of the penthouse apartment. Cheon Seo Jin, the prima donna of the residence, does all she can to give everything to her daughter. Oh Yoon Hee comes from a poor family background, but she strives to enter high society by becoming the queen of the penthouse, the pinnacle of success in her eyes.

Season 2 of The Penthouse premiered on February 19, 2021.

Seo Jin and Dan Tae eventually get rid of everyone who was in their way. They shamelessly frame Yoon Hee for the murder of Su Ryeon and even cover up the death of Seol A. The residents of Hera Palace believe everything will return to how it used to be. However, the tides change when Yoon Hee escapes prison and Eun Byeol discovers the truth. Their mysterious fates are still yet to be seen. Will they manage to protect their precious palace until the very end?

Season 3 of The Penthouse premiered on June 4, 2021.

Su Ryeon finally takes revenge on the residents of Hera Palace. They lost all of their money by investing in Cheonsoo District, and even worse, they stand before the court for covering up Seol A’s death. Those greedy residents of Hera Palace who caught themselves in their own traps end up losing their fortunes, reputations, and everything they had, and Su Ryeon succeeds in getting her revenge on Dan Tae who tried to kill her. When Su Ryeon thought the nightmare is finally over, she witnesses Logan’s death right before her eyes. Who could have planned to murder Logan, and what will happen to the residents of Hera Palace next? Their desire for revenge is not over yet.