When heinous criminals evade justice, citizens over 18 receive a text polling them on whether the criminal should be sentenced to death. If over 50% vote in favor, the person is killed by "Dog Mask," an anonymous figure operating in the virtual world. The police pursue "Dog Mask," and three individuals become embroiled in the case: Kim Moo Chan, leader of the First Investigation Team at the Southern Police Agency; Kwon Seok Joo, a former legal scholar who killed the rapist of his daughter; and Joo Hyun, a police officer at the Cyber Safety Bureau of the Seoul Metropolitan Police Agency. (Source: MyDramaList) ~~ Adapted from the webtoon "Gukminsahyeongtupyo" (국민사형투표) written by Um Se Yoon (엄세윤) and illustrated by Jung Yi Pum (정이품).