A virus caused massive chaos into entire AINA city It'll rot a human and they'll turn into what they called zombies Iori and Sougo are just normal university students when one of their schoolmates got infected and the virus spread out leaving the 2 of them as the only survivors and they met another stranger named yamato luckily for them they met an army force unit named I.DOL and another strange man who introduced himself as riku who is a trainee researcher from a secret laboratory organization W. R. U together they'll discover the truth behind all of this amd fight against the infected how will they stop this chaos