In 2023, environmental pollution of the globe had gone out of control. Ocean trash and industrial chemicals were the cause of dead sea creatures. Climate change, global warming and radiation were the consequences of a broken ozone layer. Unprecedented high levels of pollution ruined the human body. That outbreak of blood cancer to 95 percent of the world population became a threat of extinction. With advances in medical sciences, thousands of organizations around the globe were racing to find a cure for withering lives. In 2027, P.E.A.C.E Corp., for the first time in history had successfully created “Z” - an antidote to every diseases. Invented by Dr. Akasha, “Z” enters human genes and produces Z cells, which is a kind of phagocyte capable of swallowing all abnormal cells. People who had the antidote seemed to recover completely, extend the life span and immune to all diseases. However when there were no more abnormal cells to consume, Z cells became hungry. As a result, they eat all other ordinary cells. When the brain is eaten up, it turns dead bodies reanimated with a nonstop need to feed. When bitten, people and animals also get infected with Z cells. At the Apocalypse Day, almost "Z" users suddenly became zombies. Once again, human kind is facing the peril of dying, even worse, this time in blood and gore. Three years after the Apocalypse, Steve Rogers, a zombie hunter, has rescued Scarlet, daughter of Dr. Akasha, from a zombie horde. Together they try to survive, gather other survivors and find Dr. Akasha to search for the lost antidote.