Peter, 17 years old, six foot tall and good looking has started to notice a ghostly orb hanging around in his bedroom, at the home he shares with his divorced mum. He resolves to speak to it the next time it appears and just as he is about to fall asleep that evening, the orb appears. He speaks to it and it answers back.
The orb turns out to be nothing to do with a spirit but is actually a contact device called a 'Visioner' belonging to an alien ambassador, who has been studying and learning about Peter and his girlfriend Julie for nearly four years. Having decided that Peter was now old enough to understand the situation and mature enough to deal with it, the alien has made contact.
After meeting the alien, whom Peter nicknames 'Clix', their friendship begins. Soon after, and having been given his own Visioner which can be used not only to see relatives in the present time but also to see relatives from times gone by and experience the same smells, sounds and sensations as they do, Peter undertakes what turns out to be a harrowing 'trip' to experience the horrors of how his great grandfather lost his life during the Second World War.
On his return from that trip, Peter mentions to Clix that he'd noticed another Visioner, a blue orb, which Clix warns belongs to a rogue alien race, on the lookout for suitable gene donors, to strengthen their weakening race. Clix warns that it might affect Julie and allows Peter to let Julie into the secrets of the Visioner.
To show Julie how the Visioner works, Peter looks in on her Auntie in Australia, only to find her and her husband at the bedside of their sick daughter, who urgently needs a bone marrow transplant to survive. Julie's family and Peter all undergo blood tests and Julie's mum, who proves to be an exact match, jets off to Australia. The very evening that she leaves for Australia, Julie's younger sister Jeanie is abducted along with her best friend Li-Wei.
Through the use of the Visioner, Peter discovers that they, along with numerous other young girls are being held in a hypnotised state inside the rogue alien spacecraft, awaiting the gene harvesting process. So unfolds the race to find and free them before their bodies are violated and possible further harm occurs.