A lonely boy befriends Ben, the leader of a violent swarm of killer rats.

A lonely boy named Danny Garrison befriends Ben, the rat leader of the swarm of rats that had been trained by Willard Stiles. Ben becomes the boy's best friend, protecting him from bullying and keeping his spirits up in the face of a heart condition. However, things gradually take a downward turn as Ben's swarm becomes violent, resulting in several deaths.—Johnny P