In the series finale, investigators reveal what they have uncovered to the victim's families. The next generation is inspirational in battling the heroin epidemic. It is determined whether Dollar Bill is to be held accountable for his crimes.
Suspicious of local law enforcement's motives, investigators meet with law enforcement to facilitate a search warrant for a possible murder victim's burned remains. A new suspect with a history of violence against women emerges.
As Dollar Bill seems to be informing on fellow dealers in a federal drug case, his associates start coming forward with critical information. The FBI searches Dollar's former trap house for a victim's burned remains.
Investigators track Dollar Bill to Portsmouth, ground zero for a deadly heroin epidemic. Another missing woman leaves behind a shocking trail of clues exposing police informants in a deadly game of cat and mouse.
The opioid epidemic is raging as the town sends out a SWAT team to bust the dealers. A jailhouse informant reveals new persons of interest and a phone with a shocking message mysteriously disappears at the police station.
The town becomes fearful of a serial killer as three more women disappear. Joe and Angela seek the help of a criminal profiler, Steve Bongardt. Although they catch and convict a possible murderer, suspicions arise whether he is the real serial killer.