Roleplay series. Six children become Cadets at a hidden high-tech emergency response centre. The children must quickly assess and resolve a major emergency, under the watchful eye of mentor 'The Commander', weighing up interactive briefings and video field reports. A dangerous new virus breaks out in a remote Scottish town, with no cure yet found. The cadets' challenge is clear. They must contain the mystery sickness before it spreads out of control and overwhelms major cities.