Due to the deteriorating health of his father, the organization's boss, Yoo-hyun, the first successor, attempts to take over the organization... "I need to see a grandson." Is it even possible for the succession condition to be an 'heir' (second generation)? Pressured by his father, the search begins for a husband for Yoo-hyun, an Omega. Amidst countless interferences surrounding Yoo-hyun, his childhood friend and second-in-command, Hyun-do, who also covets the boss position, hears the news... "Who are you going to have a child with besides me?" The dangerous relationship between Yoo-hyun, who is determined to protect his boss position, and Hyun-do, an Alpha who intends to possess him. The succession war begins with the condition of producing an heir. Between desire, obsession, and love, what will Yoo-hyun's choice be...?