In a haunting exploration of grief and the quest for justice, "River" follows the life of John River, a brilliant but troubled police detective played by Stellan Skarsgard. Haunted by the unsolved murder of his partner, he grapples with his inner demons while trying to navigate the complexities of his job. River's world becomes increasingly blurred as he starts to see and converse with the dead, including the spirit of his late partner, who offers both guidance and torment.

As River delves deeper into the case, he encounters a diverse cast of characters, including the determined Nicola Walker as his partner, and Adeel Akhtar, who brings an unexpected layer of complexity to the narrative. Each character is intricately woven into River's journey, revealing their own struggles and motivations, which adds to the rich tapestry of this crime thriller.

The series is steeped in a tense atmosphere, masterfully blending drama and psychological elements, as River must confront not only the mysteries surrounding the murder but also the shadows of his own past. As the story unfolds, viewers are drawn into a compelling narrative that challenges perceptions of reality and truth, making "River" a captivating watch for fans of crime dramas with a psychological twist.