Still missing many of their most treasured memories, the TARDIS team stumble across a Memory Ark, and their reality starts to fray further at the edges... Can the Doctor and Alice stop the Sapling from growing into the genocidal creature of destruction it is doomed to be? Can they reclaim their missing memories without destroying this new being? And can they have amazing, brain-bending trips through time and space along the way? To the last question - absolutely! For everything else, you"ll need to read on!