The life of Osman Bey, the son of Ertuğrul and the founder of the Ottoman Empire, as he established and controlled it, facing internal and external struggles against Byzantium and the Mongol Ilkhanate.
A young and successful entrepreneur has difficulty in coming to terms with his religious upbringing. One day he is pushed into substitute for his ailing friend as the Imam of a small village.
During World War I, a group of determined soldiers fights to defend Ottoman territory against English invasion.