Evil mastermind Goldfist is behind a cunning plan to interfere with London's waterways - can the Spy School cadets crack the right codes to stop him? Their mission takes them to the London Aquarium, where they come face to face with a creature from the deep.

When evil genius Goldfist takes over the world's internet, the nation is plunged into chaos. Anything 'smart' - from traffic lights to automatic doors - is under Goldfist's control, so the Spy School cadets must hurry to the London Eye to try to stop him before it's too late!