"Cause and effect. It applies to everything."

Taren Capel's legacy is unleashed, and death stalks the streets. As Uvanov fights for his career and life, Paullus contacts a force which could be the salvation of the people of Kaldor -- or their destruction.

With Carnell gone, Iago is the only one who can save the city from its fate -- but to do that, he must sacrifice everything...

Kaldor City - Checkmate uses characters and concepts from Chris Boucher's Doctor Who novel Corpse Marker to tell an apocalyptic tale of subterfuge and revelation.