The Crucifixion has been cancelled. The Aztecs and the Sioux are threatening nuclear war. The armies of Ancient Rome and Carthage have been destroyed by a force field. Human history is unraveling, and only a few people realize it is happening; the same team of music historians who faced an imploding universe a few years earlier. But this is different. The damage is being done by millions of people from the future, and they don't even know why it is...