The Penthouse is a season-based suspense drama set in Hera Palace, a luxury high-rise residence in Seoul’s Gangnam district, where wealth, power, education, revenge, and family ambition collide. The story follows residents who have already entered high society and those desperate to climb to the top, as they use secrets, status, and betrayal against one another. Driven by parents willing to do anything for their children’s success, the series turns real social anxieties around class, real estate, and private education into a gripping revenge thriller. With lavish settings, intense characters, fast-paced twists, and high emotional stakes, The Penthouse maximizes the appeal of Korean-style premium suspense and expanded into three seasons after its breakout success.