This is the basic synopsis of the story:
Zac is a genius inventor. His parents are dull and boring bird-watching enthusiasts. They don't approve of technology and have banned all gadgets from the house. Zac’s only refuge is his secret laboratory hidden in the attic above his bedroom.Whilst his parents are out on a hunt to find a rare bird, Zac hears disturbing noises coming from the basement. He discovers something which also attracts the attention of a couple of aliens with a particularly bad attitude. Speaking in a strange mix of Shakespearian English and cockney-rhyming-slang, they explain to Zac their intentions to use Planet-Earth for a spot of target practice.
Zac is in deep trouble and his parents are due back at any moment….