Harrow is drawn into reopening a closed case after quitting his job, even as he tries to re-connect with his estranged daughter. When a body is found in the river he finds himself drawn back to the Coroner's office.

Harrow tracks his daughter, Fern, who is squatting with her boyfriend. A murder case leads him into the world of ancient weaponry, and he finds himself in an ethics dilemma in the "River Bones" case regarding evidence.

Harrow and Dass head north on a crocodile hunt, Harrow is afraid or reptiles. He needs information on a boat and sends Simon to his yacht, where he surprises Fern. Simon discovers a new clue in the River Bones case.

Two boys find the body of a woman, involved in a child abduction case. Harrow and Dass vie to find out about the River Bones clue. Harrow gets there first. After her boyfriend is mugged Fern makes an agreement with a drug dealer.

Two young travelers are dead and Harrow suspects the involvement of a prominent international businessman, but vested bureaucratic forces confound him at every turn.

Dass is taken off the River Bones case. She and Harrow attend a country car accident and learn some dark secrets. Quinn's car is found, Steph is questioned, Fern finds out and tells Harrow. Fern breaks up with Cal, needing to learn more.

A high school student's death investigation is hampered by uncooperative classmates. Steph's home is searched. CCTV footage reveals a new suspect. Harrow is growing suspicious of Dass.

A suspicious death at a nursing home causes Harrow to reflect on his own crime, as the investigation into Robert Quinn's murder gains momentum.

As Harrow deals with his most bizarre autopsy yet, Dass and Simon finally close in on the truth about who killed Robert Quinn.