The Choi family line was blessed with massive wealth in exchange for a curse. Once a Choi reaches a certain age, a beast activates from within them that becomes harder to control as one gets older. Because this curse desires to live through generations, the only way to tame the beast is through marriage and bearing a child. Being the only child with no cousins, Elio is determined to let this curse die with him. But the possibility of living with this beast forever puts him in a tough position.