Based on the award-winning British series, 'Happy Valley.' The series follows a no-nonsense police sergeant (Nurgül Yeşilçay) in a small town whose world is turned upside down when the man she thinks is responsible for her daughter’s death is released from prison.

Mihri is a grieving mother who lost her daughter after a great disaster years ago. As a result of a radical decision she took after this loss, her family split up, and she is left all alone. Comforted by the warmth of her grandchild, who was the only memory of her daughter, Mihri has resulted to living a simple and small life, at peace with what life brought her. That is until she hears that Ejder, the man responsible for his daughter's death and a crime machine, is out of prison. Now her only thought is to catch him, put him behind bars again, establish justice, and prevent the disaster that befell her daughter from happening to another innocent. Mihri trusts her intuition and follows it -- and she's right.

As soon as Ejder gets out of prison, he commits a terrible crime and harms another young girl. Mihri puts forth her profession, even her life, to prevent him, to stop him. After a long struggle, she finally catches him and puts him in jail. However, another bond connects Ejder and Mihri, and this bond will not be broken forever. It is little Umut. While Mihri is trying to collect the pieces of her family that have fallen apart, she also enters into a great struggle not to lose her grandchild.