"The Hitchhiker's Guide to the Galaxy" tells the story of a perfectly ordinary human being from England called Arthur Dent. One morning, he finds himself lying in front of a huge yellow bulldozer because a man from the local council, called Prosser, is trying to drive a bypass through his house.

While Arthur is arguing with Prosser, his old friend Ford Prefect turns up, brings Arthur in a pub, and tells him that he's not from Guilford after all, but from a small planet in the vicinity of Betelgeuse! His real job is researcher for an odd book as popular as inacurate, "The hitch-hiker's guide to the galaxy". Even more important, the earth is going to be destroyed by the evil Vogons to build a hyperspace express route.

Thanks to Ford, Arthur is going to flee from earth a few seconds before the vogon ships beams of demolition are energized. In fact Arthur and Ford got a lift, and are now in the Vogons construction ship! They will now have to face Vogon poetry, dying in the vacuum of space, the strange logic of the Infinite Improbability Drive, happy doors, the Ravenous Bugblatter beast of Trall, towels, a sperm whale, mice, humane cops, hair...