Hançer was working in his bakery when the quake hit at 4:17 am (0117 GMT).
Calling home, he found his wife and three adult children were safe at home in their one-storey house, although it was damaged as the earth shook.
But no one could reach Irmak, the youngest, who had stayed the night at her grandmother's house.
She had planned to spend time with cousins visiting from Istanbul and Hatay.
Rushing to his mother's building, Hançer found the eight-storey block collapsed into a mound of rubble.
In the middle, amid the debris of everyday life, was his daughter.
Waiting more than a day before any rescue team arrived, Hançer and other local people tried to find their loved ones under the ruins themselves, even trying -- and failing -- to shift concrete blocks by hand.
Unable to recover Irmak's body, he remained sat by her side.