William, the masked man, is obsessed with Isabella and visits the brothel all the time just to see her. Unlike Isabella’s former betrothed, Crown Prince Samuel, who was very strict and serious, William is completely different. He gives her a lot of strong and sweet love. As Isabella feels his deep kindness and passion, she gradually falls in love with him too. Before long, Isabella really wants to see the true face under William's mask. During a date, she finally finds the courage to ask him to take it off...