Following a serial murder case in Tehran, Major Hosseini, an experienced police detective is assigned to solve it. After he starts his investigations, he finds several clues. Following several quarrels, he also finds out that the murderer must be someone rather sick and smart. He seems so determined to put an end to these murders and he must lead the way on his own.

As part of a conspiracy orchestrated by the British intelligence service, a group of Iranian expatriates recruited mainly from Mojahedin-e-Khalq organization plan to instigate riots in the aftermath of 2009 Iran presidential elections.

The story is about two cousins who used to be a couple. Due to their granddad illness, they have to pretend that they are still happy together and are going to marry soon.