On the surface, Seonghyeok is a born powerhouse blessed with every advantage an alpha through and through. Everyone envies him and harbors jealousy, yet beneath it all lies a profound loneliness. His parents despise him, and his stepbrother Yu-in, who is technically Seonghyeok's younger sibling but still childlike in many ways, exploits that softness toward him, treating him like a toy to manipulate at will. The moment Seonghyeok realizes something is wrong with his body one day, his life crosses a point of no return. With no time to adjust to a body that is no longer that of an alpha, he crumbles helplessly under his stepbrother's cunning schemes...