The story is about a lonely 10-year-old boy named Lucas Nic who has just moved to a new neighborhood. His parents, who fail to understand his problems, go on a honeymoon in Puerto Vallarta, leaving him with his older sister and his Grandmother (Mommo), who obsesses over aliens and UFOs. Tormented by a local bully and his gang, Lucas in turn attacks an anthill, flooding it with a squirt gun. This terrifies the ants, who call him Peanut the Destroyer (Peanut being his mother's nick name for him). One ant, an eccentric wizard named Zoc, tries to fight back. His girlfriend, a nurse ant named Hova, believes in finding a more peaceful solution by attempting to communicate with Lucas. She is almost crushed by Lucas while trying to do so but is rescued by Zoc. After a devastating attack floods the hatching chambers, the leaders of the colony decide to use a potion (which Zoc made from some magical gemstones) to shrink Lucas down to size of an ant.