As Dr. Daniel Harrow tries to mend his bridges with his daughter, he is embroiled in a murder investigation that has been staged to look like an accident.
Harrow struggles to determine a course of action in the River Bones case which raises the question of whether he is willing to compromise his morals.
With Harrow looking for information, he is forced to endure a loathed hunt for crocodiles as he battles his fears of reptiles. New evidence comes to light in the River Bones case.
Harrow moves fast to get ahead of Dass in the investigation of the metal plaque connected to the River Bones case. Harrow gets a puzzling case about a woman who was in pursuit of her missing son, but the facts of the case reveal a surprise.
When Fern lands in trouble with the law, Harrow intervenes to solve the mystery behind two drug-related deaths before his daughter gets implicated. The identity of the victim of the Rivers Bones case is revealed.
Dass and Harrow's newest case proves to be too complicated as bureaucratic red tape hampers their investigation and puts Harrow's life on the line.
When Harrow's relationship with Dass is discovered, Dass is taken off the River Bones case. Fern refuses to leave with her boyfriend as she seeks answers about Quinn. A case involving a mother and a son reveals a haunting family secret with a connection to an old case.
As the investigation into Quinn's murder continues, Stephanie becomes a suspect when his wedding band is found with her. The discovery of a connection between Fern and Quinn's car spells trouble for the former.
As Fern becomes a suspect, Nichols looks into her and Harrow's whereabouts on the night Quinn was murdered, uncovering suspicious events that suggest Harrow's involvement.
The investigation into Robert Quinn's murder comes to a head as the chilling truth is revealed, forcing several people to reevaluate where their loyalties lie.