After many dangerous journeys and duels with the most terrible monsters in time and space, the Thirteenth Doctor finally has her final adventure to fight her most deadly enemies: Daleks, Cybermen and her nemesis, the Master. Who is attacking a high-speed train at the edge of a distant galaxy? Why are seismologists disappearing from the earth in the 21st century? Where are the missing world famous paintings? Why would a Dalek contact the Doctor? What happened between the evil monk Rasputin and Tsar Nicholas in Russia in 1916? Threat after threat is revealed before the Doctor. In this life-and-death battle, where will she go...