Episode 2 (S01E02)

The bodies of Chris and Peta have been discovered adrift near the shores of Guatemala, and the murderer remains at large while a crucial witness struggles to share their story. For forty years, the investigation goes cold, until Chris's sister, Penny, takes matters into her own hands as an online investigator. In her quest for answers, she uncovers a shocking truth that is far more sinister than anyone had anticipated.