In the fight against the eradication of evil in the world, the government adopts a system that boils down to the existence of a "book of life" belonging to each inhabitant, and which has 3 pages that, when they fall in their entirety, eliminate the life of the respective owner. Each book contains, on each page, the 3 qualities that are seen as essential for an organized and healthy life in society: intelligence, kindness, and honesty. However, this system reveals a flaw. Serial killers, known for their great intelligence, manage to survive, keeping the intelligence sheet and disrupting the lives of those who fight for a better world. Noir, who experiences the feeling of being in the "wrong place at the wrong time" on his own skin, is unfairly accused and needs to turn to his book of life to prove his innocence, however, it was strategically stolen. This is a story that will follow the tragedy of Taeha's death, who will never give up knowing the truth and getting revenge, and Noir's incrimination, testing the limits of goodness and evil and witnessing which of the two reveals the greatest power.