Two speleologists, Esteban and Pedro, travel to a mountainous area located in northern Spain, near a small village, to study a newly discovered cave and determine if it is of scientific interest, while Gabi, Esteban's wife, awaits their return on a lonely road at the foot of the mountain.
The disastrous meltdown of a nuclear power plant in Northern Spain created a contaminated no-go zone and left the nearby provincial city and inhabitants in a state of shock and mourning. Three years later, while the city prepares for the commemoration ceremony, a mutilated body is found in a warehouse. Police inspector Hector Uria's search for the murderer takes him deep into the no-go zone and into his own past.
On March 11, 2004, the Cercanías network in Madrid suffered terrorist attacks that cost the lives of more than 190 people.
