Bi Gonah 18 (سریال بی گناه قسمت هجدهم) is a series directed by Mehran Ahmadi was made in 1400. This series is produced in Iran and in the family and social genre. Bigonah is about Bahman Mardani returns to Iran to discover the secret of what caused him to flee abroad twenty-five years ago, the family of Rashid Farshbaf, the famous master of carpet design, puts him in a new situation, a very strange situation. he actors who have acted in the series of Mehran Ahmadi are: Mehran Ahmadi, Mohsen Kiaei, Shabnam Moghadami, Masoud Raajan, Mahor Elvand, Vishka Asayesh, Mehrane Mohin Torabi, Atila Pesiani, Nasreen Nosrati and Hadih Bazund.