Two Time Lord Academy students discover and explore an old abandoned cave that used to belong to the founding fathers of Time Lord Society. What they find inside will shake the universe to the bone.
Gallifrey is being invaded by an unknown force. The Doctor and the Master must find a way to stop them, and cannot let themselves be easily distracted by anything.
Gallifrey is in ruins. The enemy has won. All the Doctor and the Master can do is save any survivors before it's too late. While doing so, they bump into an unknown Time Lord - from the future?
With the enemy properly revealed, the Doctor and Falcon find themselves up against the remaining population of Gallfrey under Omega's control, but that happens to be the least of their worries, as the Doctor's life will soon change.
