The grim days of Cromwell are past. Freed from the structures of the Protectorate, London seethes with new energy, but many of its citizens have lost their livelihoods. One is Thomas Chaloner, a reluctant spy for the feared Secretary of State, John Thurloe. His erstwhile employer recommends Thomas to Lord Clarendon, but in return demands that Thomas keep him informed of any plot against him. But what Thomas discovers is that Thurloe had sent another ex-employee to White Hall—and he is dead, purportedly murdered by footpads near the Thames. Thomas volunteers to investigate his killing, but instead he is dispatched to the Tower to unearth the gold buried by the last Governor. There, he discovers not treasure, but evidence that, whomever is in power, greed and self-interest are uppermost in men's minds. And that his own life has no value to either side.