Robin Penmarch lives a regular life in the Lost Isle, where he and his friends are protected from an ever-present danger by magic and knights in armor, until one day Robin's rare, magical potential is accidentally revealed in the presence of Quadehar the Sorcerer.

Having been reunited with their zombie father only to have him turn into a vampire after drinking an experimental elixir of life, the ten-year-old Shluffmuffin twins continue to try to elude the giant ants who want to enslave all humans.