Hera Palace, a luxury 100-floor apartment, has many secrets and hidden ambitions. SHIM Suryeon, who was born into wealth, is the queen of the penthouse apartment. CHEON Seojin, the prima donna of the residence, does all she can to give everything to her daughter. OH Yoonhee comes from a poor family background, but strives to enter high society by becoming the queen of the penthouse.