 Young Johnathan is shocked to find that the bedtime stories he was told by his deceased grandfather, the infamous GRAMPA SETH, of evil GOBLINS who turn people into living vegetables in order to eat them, is about to come to terrifying reality on a family trip to the town of NILBOG. With the assistance of the Troll master, CREEDENCE LEONORE GIELGUD, the Trolls wish to feed Johnathan s family evil food.