mysterious old woman appears before Setsu, who has recently lost her only child in a tragic accident. She says she can bring Setsu's son, Daio back to life. After agreeing to this sinister proposal, Daio returns to his mother, but to Setsu's horror, he is half decomposed and inhuman. To make him human again, he needs fresh human organs. Setsu does everything she can to reincarnate her son, but Daio just turns into a different kind of monster. No one can stop him as he continues to feed his hunger, claiming victim after victim.

Overview from themoviedb.org