After the death of his overbearing mother, the privileged Arda reflects on his young life, and on the life of his father, the famous mathematician Mursel Ergenekon, who was murdered on Arda's fourteenth birthday. Meanwhile, on the other side of the city Bedirhan has decided to pack in his ten-year career as an assassin.

Ziya Bey has six months left to live. From his mansion on Farewell Fountain Street, the Ottoman aristocrat plans to tie up some questionable business affairs and say goodbye to the people he cherishes. He hires Artvin, a disillusioned professor with a troubled past, to assist him. Intrigued by his employer's mysterious household, Artvin spends the days uncovering Ziya Bey's turbulent life story. The two men become bound together as they reveal dark elements from their pasts. But when Ziya Bey releases Artvin from his duties sooner than expected, Artvin inherits a spiral of violence he cannot...