After a nuclear accident in the north of Spain, a vast exclusion zone was set up to contain the risk of radioactive propagation. Survivors have been rehoused in a new city 50 km away from the power plant. A series of murders lead Héctor, the police chief who survived the catastrophe to embark on an investigation to find the culprit. The problem is that, while doing this, he discovers many other things. After the disaster, reality changes forever.