The story of Melissa Jesperson-Moore, who at age 15 discovered that her father, Keith Hunter Jesperson, was the serial murderer known as the Happy Face Killer.
Cast: Annaleigh Ashford, Dennis Quaid, James Wolk, Tamera Tomakili, Khiyla Aynne, Benjamin Mackey
Melissa solves the case. Keith suffers an attack. Ben faces consequences for his actions. Series finale.
Melissa faces a dark family secret that leads her back to Ash. Ben takes drastic measures to protect his family. The case takes yet another turn.
Melissa and Ivy find unknown footage of Heather that changes everything. Elijah gets his day in court. Ben gets bad news. Joyce's secret is revealed.
Melissa creates an unlikely alliance when crucial evidence goes missing. Elijah weighs a plea deal. Hazel begins a secret correspondence.
Melissa reconnects with her brother and confronts her father, who finally offers a clue about the case. Hazel receives an unexpected invitation.
Melissa navigates the highs and lows of going public with her story; the team questions Elijah's innocence as Keith gets thrown into solitary.
Melissa and Ivy travel to Texas to learn everything about Heather Richmond's murder. What they find there pushes Melissa to step into the light.
After decades of no contact, the “Happy Face Killer” and his daughter are begrudgingly reunited, in order for her to find out if an innocent man is going to be put to death for a crime he committed.