Oğuz is a very successful screenwriter and is very good at his job. While he is in high demand in the industry, he makes a radical decision to quit screenwriting. Oğuz's closest friend is his upstairs neighbor, Ertem, a former famous director. The two are always confiding in each other. Oğuz and his friends spend a day they can't remember while everything in their lives is going wrong, and suddenly wake up at home. However, their lives have changed, and everything has started to go very well. They begin receiving job offers one after another. What happened on that night that changed their lives?

The screenwriter of the Istanbul Guardians series is busy preparing for the new episode to be released. When his boss asks him to write an episode introducing the Gümüşçüler Çarşısı (Silversmiths' Bazaar), he goes to Veli Dede's shop to do some research. The young woman finds herself in the midst of a great mystery at the shop she went to for research. According to the stories, there is a hidden treasure beneath Istanbul, and the secret of this treasure is entrusted to the silversmiths. Veli Dede is the last guardian of this treasure. The treasure is not a valuable stone like gold, diamonds, or rubies, but a life-giving water that heals those who drink it and keeps them from aging. After learning this, Aslı embarks on a mysterious adventure.