The opening act of a gripping espionage series. A rendezvous with a confidential source turns deadly, and MI5 agent John Hughes suspects a far-reaching conspiracy at its heart.

The series pulses with suspense. John believes he has uncovered a plot for assassination, unaware that his wife is attracting the attention of a colleague.

John’s pursuit of the shadowy Iranian general deepens into a growing unease. He finds himself increasingly plagued by the suspicion that deception surrounds him – at his workplace, and even within the familiar walls of his own home.

To avert the coming assault, John must break free from his confinement. But those who desire the attack's fulfillment will pursue him relentlessly.