Should you believe what you see with your own eyes, even if it can't be explained? Laurie is worried. Her father refuses to discuss the vision they have seen lurking by his science lab: glowing, dangerous-looking horsemen bearing bows and swords. Laurie is sure that the horsemen are portents of doom. Are they somehow connected to her father's mysterious genetic research? The recent bombings in Birmingham, England? The unrest in Shasakstan, a country ruled by a dictatorship and armed with nuclear weapons? And if these horsemen do pose a threat, is it too late for Laurie to stop them?