30 years ago, when members of a religious cult known as Heaven's Veil take their own lives. The truth behind what really happened remains buried deep in the memory of the sole survivor, a five-year-old girl. Now as an adult she returns to the compound with a documentary crew. They soon discover something that is far more terrifying than anything they could have imagined.

Dexter Morgan, a blood spatter pattern analyst for the Miami Metro Police also leads a secret life as a serial killer, hunting down criminals who have slipped through the cracks of justice.