Following the increased activity of the CUCW (Council for the Unification of the Communist World), a new division of COSMIC (Commonwealth Offices of Security and Military Intelligence Co-ordination) is formed with the code name SCU3. A 'Hunter' agent (No. 5) is assigned to SCU3, and his first assignment is to investigate the mysterious suicide of scientist Dr. Brian Tolhurst, who was working on an anti-missile project. Following a lead that Tolhurst's car contains evidence of foul play, Hunter comes within seconds of death when CUCW agent Kragg plants a bomb and blows the car up.