When single dad David Heisler goes missing, digital clues lead detectives into the desert, but the trail stops cold. Investigators ask digital forensics experts to help them unravel this twisted mystery and reveal the truth of what happened.

When police find 64-year-old nurse Athena Valentiny brutally murdered in her home, investigators follow the digital trail her killer left behind. They cross-reference the digital evidence with surveillance video to reveal who took her life.