Teenage undercover agents Rose, Blane and Daisy bring us thrilling chases, hi-tech wizardry and gadget-tastic action. Working for M.I High - M.I. 9's division of highly trained teen spies whose headquarters is hidden in the depths of their school, their mission is to protect Britain from the evil Super Kriminal Underground League (S.K.U.L.), run by the Grand Master. In Series Two he is more power-crazed than ever, and the agents must save the country from a strange sleeping sickness which sweeps the nation, a new cold war, and investigate a mysterious wave of crime committed by well-behaved children; all without their classmates finding out!