When five-year-old Rory unearths his estranged father's handmade crystal radio—which happens to patch straight through to Hell—violence and terror reign in the form of hellhounds, shadow figures, and demonic possessions.

Aided by a laconic fisherman and a charming warlock, Rory's mother, Rachelle, must track down her ex, the only person who can shut down the radio before the worst fiends of Hell are set loose on Earth.