A serious diagnosis is a blessing in disguise for Agah, a retired court clerk with a vendetta against a judge who ruled over a decades-old crime. Agah's chance encounter with an elegant woman ignites a spree of guilt-less revenge crimes.

Agah suspects his condition is worsening and uses it to advance through his hit list despite his daughter's return from Australia. Meanwhile, a desperate journalist trades information on the murder case for an interview with homicide Detective Nevra.

Nevra investigates leads while a second body is found with a note addressed to her that drastically impacts the case, tipping her further from the truth. Agah tries to escape the hospital to hide evidence and continue his plot for revenge.

Agah explores his life-long struggle with telling the truth. Ates antagonizes the killer in his interview while Nevra investigates new evidence linking the courthouse fire to the murders. A close encounter with police could derail Agah's plan.

Nevra is accused of corruption and fights to remain on the case despite evidence linking her to the murders. Nevra finds that local police records reveal a very different story about the burned home in Kombura.

Time is running out for Nevra in Kombura. An unreliable confession complicates the case as another body is discovered-along with more messages to Nevra.

Bodies-and clues-pile up as the residents of Kombura demand answers. In Instanbul, a suspect is apprehended in a murder, bringing victory for Firuz over Nevra. Agah goes to great lengths to conceal his diagnosis from his daughter.

The "Dog Killer'' becomes iconic and a nursing home patient threatens Agah's anonymity. Nevra learns the truth behind the Kombura fire cover-up but is left questioning who town officials are protecting in the case-and why.

A key person on Agah's hit list is spared after Agah learns that letting them live incurs more suffering than the relief of death. Nevra searches for a rape victim while Tolga and Firuz's secrets are revealed.

Deva receives a gift from the Dog Killer. The relationship between Tolga and Firuz is strained. Nevra begins to doubt her victim, rattling a childhood memory that might break the case wide open. Agah suffers an unbearable heartbreak.

Nevra discovers the source of the notes left on the victim's bodies while Ates receives a threat to discontinue his investigation efforts. Agah's forgetfulness causes him to make more mistakes as Firuz hones in on him as the main suspect.

In the season finale, everyone grows desperate as foggy memories become clear. Agah's running out of options and his daughter's life is threatened. Nevra's out of moves against a corrupted system in her search for justice.