Versatile Canadian comedian Martin Short plays a 10-year old boy in this comedy aimed at younger audiences. The tale is told in flashback to another little boy. Clifford is a manipulative brat. Clifford really wants to visit Dinosaur World in Los Angeles.
Clifford wants to go so badly that he manages to force the Hawaii bound plane he and his parents are on to land in L.A. His parents need to attend a convention in Hawaii so they leave him with his Uncle Martin who despises children. Martin's fiance adores kids, so he pretends to be ecstatic about Clifford's visit.
He must also pretend that Clifford is the angel child he isn't. Because Martin reneges on a promise to take him to Dinosaur World, Clifford begins an elaborate plot for revenge.