Taehyun is the alpha captain of the great ship, Black Swan, a scary and dark pirate ship. Taehyun is tall, handsome, has black hair, masculine and strong features, striking eyes and was an authoritarian and cold alpha. Until one day, he attacks the royal ship, and steals the governor's omega son, Choi Beomgyu, to use as a bargaining chip. He just didn't expect that Beomgyu was a lupus omega, and he was a stubborn omega, but the only one who could read the most wanted map across the seven seas.