After being framed and framed by her stepmother, Sylvia, the princess of the wolf clan, fell into the black market and was bought by the mysterious boss Vincent, who roamed in both black and white, and became his secret tool for taming. Vincent used revenge and saving his mother as bargaining chips to send Sylvia to seduce his enemy, the ruler of the vampire family - the Norton family. After three years of taming, Sylvia, who had fallen in love with him, was still ruthlessly sent to carry out the mission. Vincent thought he wouldn't care about a tool, but when he saw the tricks he taught Sylvia and how Sylvia used them on other men, he couldn't sit still!