A family backpacking trip to the Smoky Mountains turns tragic when six-year-old Dennis Martin suddenly disappears, catalyzing a massive manhunt – and rumors of a kidnapping by a giant, hairy "wildman" believed to roam the region.

In 2012, detectives in San Francisco's Chinatown uncover a wave of hauntings: female ghosts who threaten to kill elderly mothers' sons to marry them in the afterlife. What are these "ghost marriages," and why are they suddenly everywhere?