A disillusioned, drunken man sacrifices himself to save a young girl from an oncoming truck, dying in her place. However, his soul is unknowingly transferred into the body of a newborn child. The demoness, who had lost her own child, sacrifices herself to bring him back, but he drains her life force in the process. The world trembles when the child takes his first steps, but neither the child nor the man’s soul is aware.
The child, now a vessel for the man’s memories, is adopted by a noble family. As he grows, he struggles with fragmented memories and a growing, inexplicable ambition.