Sir Richard Francis Burton's expedition has returned from the future, bringing with it knowledge of technologies that must remain secret if history is to proceed as it should. However, when one of his colleagues turns rogue, the secret falls into the hands of the very people most likely to misuse it.

Betrayed, Burton and Swinburne watch in horror as the Empire's elite employ the technology to secure their positions of privilege. When London's parks are transformed into concentration camps, artists and philosophers are declared enemies of the State, and propaganda proliferates, the king's agent finds himself on the wrong side of — the king!

Can Burton and his band of hunted revolutionaries overthrow an apparently indestructible and immortal autocrat... and if so, at what personal cost?

The Spring Heeled Jack saga reaches its explosive conclusion!