Charlie and Rex open up a cold case that may be connected to a recent case; Donovan asks Charlie to spy on his daughter.

When Donovan's ex, a recovering addict, wakes up with blood on her hands and a dead roommate in her apartment, the team moves quickly, finding there's more to the story.

When the circumstances of a murder appear to mimic a crime from 20 years earlier, Charlie and Rex must connect the past to the present while fending off an interfering true crime podcaster.

When Supt. Donovan's journalism student daughter investigates the story behind a murder on her university campus, the team races to find the killer before someone else becomes the next victim.