This film is a reimagining of Raymond Briggs’ beloved children’s story, blending live-action with CGI animation to tell the tale of a family of green creatures residing in the gooey subterranean realm of Bogeydom. The parents, Fungus and Mildew, become concerned when they suspect their son, Mould, is secretly exploring human culture, leading to a family dispute that drives Mould to escape to the surface. Meanwhile, in the town of Daventry, Daryl Hedge faces constant reminders from his ambitious wife Wendy about his joblessness, while their daughter Lucy is infatuated with an unpleasant older boy named Dean.