When eleven-year-old Gregor falls through a grate in the laundry room of his apartment building he hurtles into the dark Underland where spiders rats & giant cockroaches coexist uneasily with humans. This world is on the brink of war & Gregor's arrival is no accident. Gregor has a vital role to play in the Underland's uncertain future. Gregor wants no part of it
- until he realizes it's the only way to solve the mystery of his father's disappearance. Reluctantly Gregor embarks on a dangerous adventure that will change both him & the Underland for ever.