From the outside, the House of Cards was just an upscale norebang with an expensive entrance fee and an even pricier menu. But, those who carried the Red Ace card knew better. With a personalized Red Ace, the richest customers are given special perks, including access to a "menu" of hosts and hostesses. When Taeyong becomes the owner of the only Black Ace in the deck, his eyes are open to a world that's all his own.