This is the last of Hack’s “Harvey” trilogy in which the ghost of Harvey, the murderous six-foot tall invisible rodent, comes back from the dead in search of human blood and makes Elwood P. Dowd his mind slave. Dowd is placed in an asylum for the criminally insane as Harvey slaughters and then feeds on the population of the small town where Dowd lives until they are the only ones left. Harvey finally comes into the asylum with Dowd thinking that Harvey will free him, but it eats him instead.