Monochromatic people (known as 'Monos) live in a world where they are unable to see colour and therefore view their surroundings through varying shades of grey, black and white. However, every Mono has a fated person (known as a 'Probe') who is able to trigger their grey-scale world into colour, inducing what is termed a 'Colour Rush'. Yeon Woo is a Mono. He’s aware that other colours do exist but has never experienced them for himself, nor is he interested in doing so. However, Yeon Woo’s life is forever changed when he meets Yoo Han, his Probe, and experiences his first Colour Rush. Terrified that he'll be obsessed with Yoo Han because of Yoo Han's ability to make him see colour, Yeon Woo tries desperately to avoid Yoo Han—but why does Yoo Han insist on drawing close to him?

At some point in the distant future, a massive, catastrophic earthquake strikes Tokyo, causing the temperature of the Pacific Ocean to rise meteorically and the largest typhoon in recorded Japanese history to sweep toward the city and inundate it with water. The Tokyo Fire Department and its team of crack rescuers swing into action, and shortly after they do, a distress call arises from an underground subway station - with repeated indications of the rescue code, 252 252, and the exclamation "We Have Survivors." It soon becomes apparent that the local rescue squad must attempt to save the survivors, doing so at the expense of their own lives and safety. Written by Nathan Southern