New spies Carrie and Oscar are still trying to earn their stripes with espionage leader Frank London and the pressure increases as they are told that they are still on trial. Together with the more experienced Rose, they have to work against the clock to stop a mystery criminal who is robbing all the banks in the country.

The MI High agents are protecting Dr Wallis, the inventor of The Mind Machine, a device that turns bad people good. However, the evil Grand Master has got wind of the device and wants to use it to turn good people bad, and sends a SKUL agent to capture Dr Wallis and his invention.