Remember River Song mentioning the "crash of the Byzantium" in Silence in the Library? Well, in this story, that happens: the Byzantium space ship crashes into an abandoned temple. This is no simple diaster, but a Code Red nightmare, as the Byzantium is carrying a Weeping Angel in its vault. River Song elaborately recuits the Doctor and Amy to join her and a party of cleric-soilders for a journey into the dark catacombs cheerily known as "a maze of the dead." Cue joyous tea and scones, with nothing bad happening to anyone at all...