When Mark's troubled friend, Ruby, takes her own life, a grieving Mark heads to her suicide spot to pay his respects. In a strange twist of fate, he is attacked by a powerful spirit that reveals itself to be Ruby. Shen, an exorcist from the Spiritual Anomalies Investigation Bureau, an organisation dedicated to investigating the supernatural, arrives on the scene and attempts to save Mark but complications result in Ruby's spirit binding with Mark. Now, under the guidance of the Spiritual Anomalies Investigation Bureau, Mark has to learn how to use the powers of Ruby's spirit bound to him to exorcise other spirits while revisiting Ruby's troubled past in order to unbind Ruby's spirit and allow her to pass properly into the afterlife.