This story starts with a mysterious woman being found, nude, in the grounds of the SAT Laboratory. She’s unconscious. Larna and Tom are called in to investigate. It appears that aliens had abducted her on September 15, 1995. Her memory is blank, but she remembers escaping from the space ship. While they are trying to find out what was going on, a shape shifting alien bounty hunter comes to try and take Heather Morgan back to the ship. Heather runs off, escaping to Bostary, using an explosion as the shield for her escape. The bounty hunter is not impressed and tracks after her. Tom Aspel also disappears. Larna has to try to find Heather before the bounty hunter does. She also has to investigate the disappearance of Tom Aspel.
While investigating the disappearance of Tom Aspel while he was checking on a Virtual Reality game, a mass breakout of Zarrs gives Larna a different problem. She finds out that Tom and Heather have been dragged into a game by the bounty hunter, who was also behind the breakout. The Zarr’s that have escaped have gone back through time. This was the bounty hunters plan. Larna is torn between what she should do. She knows that Tom and Heather have only got a certain amount of time left in the game machine before the bounty hunter switches the machine off. But then there are the Zarr’s; who are causing chaos in the past. She has a difficult choice to make.
It follows Larna’s trail in two halves. The first half is the adventure through the world of Virtual Reality and the games the bounty hunter throws at her. The second is her operation in the past to capture the escaped Zarr’s. When that fails, she tries to stop the breakout before it happened.