Britain's super-secret spy agency MI-9 is in trouble. All of its adult agents have been exposed. Luckily, there are a group of inner-city high school kids in training. Welcome to M.I. High. Their top secret missions are given to them by the school janitor, who is actually an ex-MI-9 agent.
When summoned by communicators disguised as pencils, the top 3 agents must find an excuse to leave class and take the hidden high-speed lift to their HQ in the school's basement.
M.I. High is produced for the BBC by the independent production company Kudos, who are responsible for the hit BBC spy drama Spooks, known in the U.S. as MI-5. MI-5 is the name of Britain's domestic Military Intelligence agency.