Fog and the Night is the search of an investigator who has lost his confidence in his organization and whose happy "family father" order has been disrupted by his young lover.And introverted man due to his profession, not a big talker or well in expressing his feelings, Sedat is being consumed, going through the hardest time of his life, not able to silence his guilty conscience because he was unsuccessful in solving the murder of his partner, whom he saw as a brother. His faith in his organization is shaken as he witnesses the schemes in machination inside the organization and between the organization and the state. Meanwhile, while trying to find his lover who has disappeared after falling for a former militant, he does not refrain from making use of the filthiest methods of his profession.