The Fourth Disaster

After seven days of enlightenment, not even one of a hundred can be saved. Fifty years after the Great Cataclysm, the human race huddled in eight cities and survived. Three of the four major disasters have names and surnames - the white clothes are bloodthirsty, the blood massacres gnaw the city, and the stray birds pass by and no grass grows. Only the fourth one, no one knows his origin. It cannot be thought of or read. The strongest person in the human race has been in seclusion for fifteen years. Fifteen years later, a surviving boy saw something that others could not see.