Happy Birthday, Türke!(1992)

Overview:

Kemal Kayankaya, a private detective, was hired by a Turkish women, Ilter, to search for his husband, Amend, who has been missing since the death of her father, Vassif. Unknownst to him, he was about to unravel the secrets of his client's family, as well as their various dealings with the underworld and the police. Moreover, being a Turk raised in a German foster family, he has also begun to understand and accept his own ethnicity.