An adaptation of Raymond Briggs' kids' classic that mixes live action and CGI animation to observe the experiences of a group group of monsters who are living at the slimy celestial environment of Bogeydom. Fungus along with his wife Mildew guess their son Mould is illicitly dabbling in civilization that is individual, igniting. Above-ground in Daventry, the go-getting wife Wendy of Daryl Hedge will not let him forget that he could be jobless, while his daughter Lucy has fallen for a unpleasant older boy called Dean.