Beat the Hackers!

Heather Mayhew's dad, Ray, has been slaving away for ages writing the ultimate anti-hacker program for computers. Meanwhile, Heather enjoys a happy, spoiled lifestyle. But just as Ray finishes his program, rubbing his hands at the thought of the fortune he'll make from it, a mysterious company called Domination PLC launches their own version of the same thing - for free. Ray is ruined.
But Heather and her father's troubles have only just started. The more they find out about Domination, the worst things get. After a journalist who comes to see them is kidnapped, Heather and Ray are forced to go on the run to escape Domination and try to save the world's computers. However, Ray is caught - so it's all up to Heather ...