Theodora Hendrix and the snare of the Shadowmongers

Theodora, Sherman and Dexter are off to New York for the holidays, but something sinister has infested the Big Pumpkin. The most odious of villains has joined forces with the frightening - no, terrifying - no, horrifying - Shadowmongers. A villain whose aim is to destory the Monstrous League of Monsters and put humans everywhere in grave danger.