Ali, a 9-year old son of Mohammad, finds out that his father is missing at the front and begins a trip to search for him without even knowing where he was. All the efforts to give up Ali are useless, and during his journey, he meets an ambulance driver called Sadegh who tries to help Ali in his decision. Although the search has no results at first, Ali finds a photo of his father in a base. After some further investigation, it is revealed that Mohammad has lost his memory due to a blast wave and is hospitalized in a mental hospital in Tehran. This is not important because Ali has found his father alive.