Reza works in a poultry farm in Isfahan, and after he learns about his father's death, he goes to his father's house and retrieves the chimpanzee that belonged to his father. Reza meets a poor girl named Shirin, whose younger sister Mahnaz is ill and needs money for treatment. Reza discovers that in his father's will, which is hidden in the lining of the chimpanzee's jacket, it is emphasized that there is a treasure map...