In not too long, after the spread of the so-called Adam Virus, which turns humans into zombies through Adam Pharmaceutical Co., Ltd., only three left united countries in the world. Following death no suspected Dr. Oh, one of the developers of the virus vaccine, Kwak Soo-hwan, a major in the Army Bureau of Rainbow City Association, responsible for repatriating Seok-hwa, a senior researcher who is living in exile on Jeju Island, in Seoul. Later, at Yeouido Shelter in Seoul, he will be in charge of Seokhwa's guardian, who took over Dr. Oh's research and participated in vaccine development. vaccine development against the Adam virus, which mutated many times, was only slow, and the resistance of the rebels attacked Rainbow City, which did not respond to the regime, a cruel city, only growing stronger. In times of chaos, Seok-hwa questions the city's policies which focus solely on vaccine development, not a drug.