save the past, or change the future

A hit and run driver, Bruce, who had a delusional disorder can't differentiate between dream or memory after he killed a person in the car accident six months ago. Due to the big trauma he experienced, his consciousness about reality and dream were messed up. He believes that he is the accident victim and seeking the driver, who is the Gang Boss, for revenge. In order to seek the truth about what happened six months ago, he looks for the professor for help....