Trump Omoi, a singer who meets Mizuki by chance, learns of the existence of a sinister child named Kitaro. One night, Nezumi-otoko plants the seeds of a vampire tree in Omoi. Omoi's frightened body gradually turns into a tree.

The government asks Kitaro to exterminate the vampire Johnny. Meanwhile, Nezumi-Otoko is hired by Johnny and is ordered to exterminate Kitaro. Nihilistic and cold, Johnny kills Kitaro with ease but his spirit is still there.