Life on the slow path has been difficult enough for the part-human Tenth Doctor. When a voice he cannot immediately identify whispers his name in the darkness, a 17th Century cannon ball hurtles out of Time to land in Pete Tyler's garden, and a Blue Box he never dreamed he would see again appears in the forest, he knows that Life will never be quite the same again. The path that had been chosen for him by a Timelord who no longer wears his face is about to change.