After making a mistake in hell a demon possesses the murdered body of a judge and is instructed to send ten souls to hell to atone for her error. As she begins her new life as a judge she comes across a dedicated police officer who has a tragic past and when she begins to send souls to hell he becomes determined to bring her to justice. The judge Kang Bit-na is played superbly by Park Shin-hye and the detective Han Da-on is played by Jae-young Kim whose opinion of her starts to soften. I personally enjoyed the earlier episodes where she was less human and exacting revenge but it is still an entertaining story and worth a watch. Be aware though it is quite violent at times in the depiction of gruesome murders.