In Desolate Angel, a deceased detective named Kevin Fahey haunts the living world, observing the aftermath of his own failures and a series of brutal murders. From his spectral vantage point, he follows his former partner Danny and a dedicated investigator named Maggie, who discovers that an innocent man was imprisoned for a crime committed by a predatory professor. Fahey eventually realizes that his own death was not an accident but a betrayal orchestrated by his corrupt partner. As Maggie closes in on the true killer, Alan Hayes, the narrative explores themes of redemption, the persistence of evil, and the heavy burden of memory. Ultimately, the ghost witnesses a final confrontation that brings justice to the victims, though it leaves him to grapple with the complex, tragic legacy of his life and partnership.