Kang Minseok works as the youngest kitchen staff member at the restaurant Black Hundred. While assisting with food styling at a broadcasting station, he unexpectedly receives a date invitation from designer Yoon Jiho. Drawn in as if enchanted by Jiho—who resembles his ultimate favorite—Minseok agrees to share a meal with him. However, he soon becomes entangled in Jiho’s strange powers and ends up spending a night with him at a hotel. When a confused Minseok tries to make sense of what happened, Jiho tells him to “return the vital energy you stole.” Fleeing from him in a panic, Minseok is then suddenly attacked by Heegong—the owner of the restaurant where he works, and an older brother figure he has been close to for ten years. Minseok soon discovers the shocking truth: they are yokai who have lived for nearly a thousand years, and in order to ascend and become dragons, they need the vital energy Minseok carries within his body…?!