For centuries, trillions of life forms throughout space have allowed humanity to believe we're alone in the Universe. Any alien who dared to befriend us has met an unfortunate end: eaten, squashed, sent to a zoo, or even planted in a garden pot. But our advances in space exploration now threaten every civilisation across the Cosmos.

Amelia, a savvy, street-smart orphan, is one of four exceptional children selected from around the globe to represent humanity in the Human Inclusion Programme at the intergalactic Star Quest Academy. Here, they'll unravel the Universe's wonders, explore strange new worlds, and encounter magical creatures. Earth's safety from invasion hinges on their success as cadets, but if any of them fail, Earth will be invaded by ruthless warlords.

When a series of sinister incidents jeopardise their mission, it becomes clear that someone – or something – wants them to fail. To save their world, the cadets must overcome their differences and combine their unique skills.