Basically, you just follow the tour to a few of its random stops (the movie was largely edited), each of them probably stranger than the last. There are four wizards (Can you guess who plays them?) that are sort of watching the bus, to see where it's going. I'm assuming they are the ones behind all the "magic".

 

Even if you don't follow the movie very well, it's still great to see for all the songs. This is one of the Beatles' best albums, and the videos that go along with them are just breathtaking.