Traumatized by his past, Ohn has shut his heart off to other men. Into his quiet life, twin brothers Seo-woo and Jae-woo suddenly appear. Unable to confess his long-held feelings, Seo-woo desperately asks his twin, Jae-woo, to approach Ra Ohn in his place. Jae-woo initially agrees out of reluctance. However, as he spends more time by Ohn's side, he finds himself naturally drawn to him. Meanwhile, Ohn slowly begins to sense that, behind their identical faces, lies a completely different warmth. Caught between two men, Ohn's heart begins to waver—When he stops seeing double, who will be the one to unlock his heart?
