Dominick Hide, a time traveller from the year 2130, is studying the London transport system of 1980. Time travellers are supposed to be observers, and are strictly forbidden to land their flying saucers. One time traveller who broke this rule accidentally killed a dog, changing history and causing many future people to disappear. Inspired by his Great Aunt Mavis, Dominick decides to find his great great grandfather. He begins to land in 1980, where his strange clothes and speech make him seem an eccentric oddball. His quest brings him into contact with beautiful boutique owner Jane, and they fall in love. As Dominick's visits become more frequent and more prolonged, he increasingly risks his indiscretion being discovered by his boss, Caleb Line, and every moment he spends in the past increases the danger that he will catastrophically change the future

Three angels are sent to Earth by Gabriel on a "fact finding mission" to blend in with the teenagers at a high school and learn first hand what peer pressure is. At the same time, Lucifer shows up to try to win some souls for his side. Chaos ensues, and so does a lot of music and dancing. All the main teenage characters, except the angels, are trying out to be in a band called "Hi-Tops". There are a few sub plots involving nerds, high school sweethearts, cheating on tests, taking drugs, etc.

Terry and Gemma are forced to take refuge in a sinister and dilapidated caravan park after their coach breaks down. During the unplanned stay, visitors and residents begin to be bumped off one by one under grizzly circumstances.