Welcome to a town called Black Hollow, where the hero of The Upside Down, a teenager named Eddie, lives. The boy lost his beloved pet dog Buddy and this happened against the background of the appearance of strange shadows in the city, which are gradually turning the city into a ghostly one. The pet has probably dived into one of the ghostly traps and can't get out. Help the boy traverse the length and breadth of the city, survive endless waves of attacks from ghostly monsters and find his pet in The Upside Down.
