The history of medicine is replete with references to many different viruses, but none of them did not threaten people to death so terrible that the mind itself rebelled against what happened. However, a terrible plague which broke out on the streets of Tokyo, was just such a deadly curse. Causing genetic mutations and turning people into fierce monsters, it is rapidly expanding its "ownership" and is about to spill outside the city. Eventually, the virus could spread across the planet, and then centuries old and formidable history of human civilization is broken forever.