Children's spy drama. Expert hacker The Worm has taken control of Britain's space defences and left the country vulnerable to attack. Blane's brother, a special forces soldier, is in the firing line. The team's computer skills are no match for the Worm and they need help. Rose devises a computer game to stop the hacker, but can Daisy charm Stewart into playing? Can Stewart win when he has no idea real lives are at stake?