Jabberwocky is really the story of Dennis Cooper (Michael Palin), a lovable dolt who is in love with Griselda Fishfinger (Annette Badland), the obese daughter of a local fisherman. It is set in the Middle Ages in England, probably around the 13th or 14th Century (partially based on a character identifying plaster as possibly being from the 12th Century). After Dennis' father dies, Dennis decides to head off to the "grand city" to find a job and make his fortune, so he can head back to his village in a state worthy to marry Griselda. However, things aren't going so swell in the city, either. Unknown to Dennis' village, there is a monster called the Jabberwock that has been terrorizing the countryside not far from the city. The city has been closed off and there's tight control over who gets in or out. People in and just outside of the city are starving; there is no work, and so on. Dennis finally sneaks into the city one morning and discovers the dire truth. The bulk of the film is a series of misadventures, focused on Dennis, as he tries to adjust to life within the city.