Year 4, on the eve of the US President's arrival in Tehran, Reza Dargahi, an airport facility worker, is following the high speed of the car, the Passer Rahmati, the Posting Patrol. The guard gun becomes missing. Captain Kiani and Captain Ghasemi officer offers the case. The security agency considers the security of the weapon to be the assassination of the US president. Reza and some of the witnesses are pressured. Reza is killed. Police find the gun at the scene. Captain Kiani and Qasemi are arrested for failing to do so and ordered that the two are not arrested along with other detainees.