Having survived the lethal Pendulum conspiracy, photographer John Wallace atones for his past mistakes. DI Patrick Bailey clings to the hope that he can, at last, return to a normal life in London. FBI investigator Christine Ash - alone and paranoid - hunts down the remaining members of the ruthless Foundation organisation. But when masked assassins strike at the heart of the UK government, a shocking new threat emerges that forces all three to reunite. With time running out, they must defeat a lethal new adversary: a manipulative mastermind with sinister powers unlike anything they've seen before.