A steel-boned fist collides with chitinous armour on a Seoul rooftop slick with monster blood. The thing screeches, rears, and slams into an air-conditioning unit — and the only witness to the takedown is a stray cat that scatters into the dark. Kang Lim yanks a white cap low over his brow, chest heaving, knuckles raw. He is a high school student who conjugates verbs by day and hunts xenoterrans by night, a solo vigilante operating in a world where mysterious creatures began spilling through the cracks of reality years ago and never stopped. The governments call it an invasion; the news calls it the new normal. Lim just calls it Tuesday.

But the White Cap is no longer Korea's only player in this shadow war. Saint Pearl crosses the ocean from the United States, Jane Sonata rises out of the United Kingdom, and the enigmatic Nangi moves through the underworld with a purpose nobody can read. Superhumans are surfacing globally, and not all of them share Lim's quiet creed of protection — some carry ideologies sharp enough to carve new borders into the planet. As Lim is dragged from rooftop skirmishes into a chess match spanning continents, the veil over the xenoterran emergence begins to fray. What he finds stitched into the fabric of the phenomenon is far older and more deliberate than a random incursion, and the creature orchestrating it has already noticed the boy in the cap.

Also known as: 초인의 시대, Choin-ui Sidae, Era of Overman, Era of Überhuman.