MI5 discover that someone is selling military secrets and must find out what's happening at a large British Arms company, from within.

Max Sargent goes in undercover and discovers a number of suspects. Using designs for the latest Omega long range sniper system as bait, he seeks out the shocking identity of the corporate thief.

But MI5 also want the arms broker and the end buyer. Max must continue to follow the Omega trail, now masquerading as the corporate spy selling the designs.

The underworld and a foreign Intelligence Service are involved. Max's trail takes him to several European destinations, as the mission gets more dangerous, ending with a tense chase and revelations.