After a successful mission against drug lords, the efficient Captain Damien Tomaso is framed at home with three kilograms of heroin planted by the police in his kitchen and he is arrested. Meanwhile a group of teenagers film the action of dirty agents led by Roland from the security agency executing policemen in their car and then leaving the car with the corpses in the 13th District to blame the gangs and begin a civil war. Behind these events, the corrupt chief of the security agency Walter Gassman had received a huge amount as kickback from the constructor Harriburton that has interest to construct buildings in the poor area and uses the situation to force the President of France to authorize to nuke five towers in the district. The teenager with the film is hunted by the police but he delivers the memory card to Leito meanwhile Damien calls him from the precinct asking for help. The friends team-up with five dangerous bosses to gather evidences to prove to the president that Gassman has provoked the conflict in their district.
A group of friends on vacation decide to venture onto a trail high up in the mountains that has been closed for repairs. The climb proves more perilous than planned, especially as they soon realize that they are not alone. The adventure turns into a nightmare.