Mirror murders continue. Thinking that the killer's messages are targeting Şahin, İpek tries to find the underlying cause of the incident and communicates with the killer. Şahin, who goes to meet the killer without informing the team and İpek, finds himself in the middle of a scene where he will be tested by the darkness inside him. The Mirror Killer presents Şahin to Bey, whom he chased for years and who took his sister away from him. While Şahin and Bey are held captive by the Mirror Killer, İpek and her team work hard to find Şahin. When İpek finally determines the identity of the murderer, this time a tough test awaits her. Will İpek and Şahin be able to catch the Mirror Killer who commits serial murders?