Imagine that some great cosmic force pushed the moon into a different orbit. An orbit that brought it far closer than normal to the Earth every fifteen days. What would be the result? What would it do to our planet, to our civilisation? Could humanity survive?

Eddie Nash and Samantha Kumiko don't have to imagine. They're living in that world, and as the Moon sweeps in for its first close approach they desperately try to prepare for a world transformed by violence and destruction. Both are scientists. Both know better than most what's coming, and both will do whatever is necessary to protect themselves and those they love as the world falls apart around them...