Babylon Tower became home for people who survived a terrible catastrophe. The authorities of the tower protect them from the underground clans living in bunkers. But even in Babylon there are rejects. Laki, a minor criminal dealing in illegal goods. Mikkel, a soldier made almost entirely of synthetics. And Rica, a true enigma hiding a dark past. They meet during cleanup jobs and become witnesses to an approaching threat. The clans are preparing an offensive. Mysterious graffiti appear on the tower walls, and power failures begin. “Ours” turn out to be “strangers,” and finding a traitor becomes even harder. Perhaps real evil lives inside the gloomy tower?