Ops Passage restaurant is located in Karaköy, one of the oldest and historic district in İstanbul, Turkey. Nowadays, Karaköy is also an important commercial center and a transportation hub for tourists and local people. Ops Passage is located in a historical passage that is called 'French Passage'. Because of historical preservation it is not allowed to built chimney so we solved charcoal filter system. Solving acoustic problems was another problem. The concept of interior design is nordic/scandinavian with soft grey tones.