hiwetel Ejiofor stars as Ray Kasten, a Los Angeles-based counter-terrorist Federal Agent turned private investigator who becomes obsessed with solving a rape/murder case from 2002 of the teenage daughter of his partner on the task force, Jess Cobb, to the point where he's been looking high and low for the man he is sure is the perpetrator for over 13 years. Kasten is sure early on of who the prime suspect should be, but because he is providing intel on a mosque near the murder scene after the events of 9/11, law enforcement sees him as too important an informant to touch without sound evidence. After he seemingly slips through their fingers, Kasten is sure he's found his guy, currently in prison, and begs District Attorney and former colleague Claire Sloan to reopen the case, but again, lack of sufficient evidence is an issue, and she doesn't want to put Jess through the ringer again without being sure. But Ray is convinced, and refuses to let things go, especially as he has spent nearly every free waking hour in getting this far.