Set during the Goryeo Dynasty, the story follows Wang Won, the ambitious and handsome Crown Prince of Goryeo, who possesses a thirst for conquest. He is joined by his childhood friend and bodyguard, Wang Rin, who comes from a royal family and is known for his elegant nature and unwavering loyalty. Their lives are irrevocably changed when they meet Eun San, the beautiful daughter of the richest man in the kingdom, who possesses a sharp wit and a resilient spirit. As the three form an inseparable bond, a complex love triangle emerges, testing the limits of friendship and loyalty. Wang Won's desire for power and his growing obsession with Eun San begin to strain his relationship with Wang Rin, who secretly harbors deep feelings for her as well. Amidst political intrigue, power struggles within the royal court, and the weight of their respective duties, the trio must navigate a treacherous path where love and ambition collide, threatening to destroy everything they hold dear.