San Young ended up being possessed by a juvenile ghost when she touched a cursed inheritance. This ghost takes control of her body, acts beyond her consciousness, and separates from her body to commit murders. A folklore professor Hae Sang, who is able to see ghosts met her and try to get rid of this ghost.

Revenant is a supernatural thriller drama with a promising premise set up strongly in the first 4 episodes. Besides our male and female lead investigating these based on the folklore pov, the two police officers investigating them through logic pov. I like how both of them were coming to the same conclusions despite working in very different ways, but I wish that they interacted a little bit more.

Production-wise, the camera angles, lighting, and the sets are creepy yet intriguing. Kim Tae Ri's portrayal of San Young is perfect; whiplashing between her character and being possessed. The folklore aspect are described with clear rules and they follow these rules. It’s very important to the story so I appreciate the writers for that.

But the plot is super slow after 6 episodes. It’s like watching the same episodes, and our protagonists are mostly bark but not bite. Each case did give clues, but they were repetitive and the lessons about folklore is a bit preachy.
They conveniently wrap up well, but left some loose ends.