At a London mainline rail terminus an elaborate trap is deployed in an attempt to capture a dangerous and elusive terrorist, codenamed Cerastes. Major Quentin Sexton and his hand-picked SSDO (Strategic Simulated Distractional Operations) Unit are poised, ready to pounce. To assist them, civilian witness Barry Hawkins and Ez Swain, his ?minder', are on hand to confirm final identification. What can possibly go wrong? For the luckless Major quite a lot really, when his key witness turns out to be a garrulous, suspiciously unreliable traffic warden and the minder, a troubled young female soldier with severe attitude problems. On top of which, is Quentin's so-called elite unit really all it's cracked up to be?