It is waiting to be learnt by us all that to win this war, we must rediscover hope - before we learn annihilation.
Trouble comes on many levels. The Kaep Twins, two planets orbiting a single star, have nearly fallen to the warfleets of their enemies. Only a handful of ships survive, but can they possibly fight off so rampant a force? Or will a millenia-old religious quest end unfulfilled?
But on another level, a mother hunts for her child in a forest inhabited by man-eating creatures. Can he have survived, or is her hope for the future really lost? And the Doctor, for whom the Kaep Twins offer the only hope of renewel; can he overcome his shortcomings and once more become Time's Champion? On a level greater than all these, again the universe is in mortal danger.
Can the Doctor undo the harm he has caused, and overcome The Horror of Angels?