Lee Ji Ah as Shim Suryeon/Naegyo stand out for me. Such a great Actress. Deserve a Daesang Award!!! I've watch a lot of Makjang kdrama such as Misty, Sky Castle, and The World of Married but for me The Penthouse is just a mind-blowing kdrama every episode was full of twist turns. The story line is so intense and just make you want to watch the whole drama in just one day. I highly recommend anyone to watch this show if they are into dark secrets, cruel revenge, evil and suspense. Can't wait for Season 3.