Recruited by the Celestial Intervention Agency to track down his oldest enemy, the Master finds himself thrown into a mission that will take him into deepest Dalek territory.

Abandoned on the planet Redemption, he assembles a crew and acquires a ship – the journey that follows is certain to test them all... and not everyone will survive.

But space pirates and living corpses are the least of their worries. Their biggest threat remains at large: a Time Lord who likes to call himself ‘the Doctor’.