When the battered corpse of a young woman turns up on the outskirts of Fallbrook, California, detectives unravel a secret world where dominance, sadomasochism, and manipulation reign.

The body of a 19-year- old man turns up in Spearfish, South Dakota and police launch a nationwide search for suspects. When an informant comes forward with clues, detectives realize the murder may be part of a sexual domination plot.

A popular teenager's body is discovered along an abandoned trail. Interviews reveal a dark side to his closest relationships, as a tale of jealousy and resentment emerges-along with an unlikely murder mastermind.

In Northern California, an anonymous tip leads detectives to a decaying corpse, buried at a mountain campsite; as police investigate their victim's past, they unveil a boisterous life of love, jealousy and one truly shocking secret.

In Colorado, police check in on a married couple- and discover a grisly double murder. Worse, the couple's teenage grandson is nowhere to be found. Robbery is first suspected, but investigators dig deeper and uncover a much more sinister plot.

In Parker Florida, a teenager is found dead days after reconnecting with his birth mother. The teen's mysterious girlfriend leads investigators into a world of occultism and revenge that exposes the secret lives of the victim's friends.

In Las Vegas, five teenagers work out constantly to optimize their strength training, then the crew's strongest member is found dead and buried in the desert, turning his best friends into murder suspects.

In Bellevue, NE, a group of teens venture into the very adult world of "partner swapping," only to find they are flirting with disaster when one of them ends up dead in a drainage ditch.

In Bellevue, WA, a teenager is found slain in a local park. As those closest to the victim lead investigators down the rabbit hole, a conspiracy is slowly unearthed, revealing this victim isn't the only one with a target on her back.

A fun-loving 25-year-old man is gunned down on the railroad tracks in Manor, Pa., turning his best friends into murder suspects.

In Hollywood, Florida, the body of a young man is found at the edge of the Everglades, and homicide investigators must wade into a sordid case of bullying, revenge and secret relationships.

When a small town girl is stabbed to death while housesitting, detectives must work to separate twisted fantasies from dead serious fact, in a case that blurs the line between movie horror and real life murder.

When a woman moves in with her boyfriend, she finds herself in unexpected competition for his affections. Soon, jealousy, deception, and the unconventional tenets of a cult-like faith conjoin- setting the stage for an Old Testament-tinged murder mystery.

After a burned dead woman is found in a luxury car, detectives must navigate the darkest corners of the competitive fitness industry- shining a spotlight on a secret world of big muscles, bigger egos, and illicit love affairs.

In Johnstown, NY, a young man's disrespectful behavior has his friends seeing red. The group plots to teach him a lesson, but things get horrifically out of hand- kicking off a murder mystery more intricate than any jigsaw puzzle.

When a North Carolina teenager becomes convinced that someone wants him dead, his friends help him lay low at an abandoned property, then the teenager winds up dead, turning all of his friends into suspects.

In the heart of Richmond, VA, a love triangle tears apart a group of gay girlfriends- and leads to brutal murder. Investigating this senseless and sadistic killing, detectives uncover a deadly plot fueled by lies, gossip, and a thirst for revenge.

A pair of hikers discover a woman's body, leading some to suspect the victim's camping buddies of murder; digging deeper, detectives unearth a tale of rage-filled jealousy, unrequited love and a deadly predator.

When firefighters extinguish a California brush fire, they unexpectedly ignite a twisted murder mystery- rife with forced prostitution, burning jealousy, and an almost unthinkable murder mastermind.

When a young man is found slain in a cemetery, there are whispers his death was some kind of ritual sacrifice. Still, detectives aren't prepared for the black magic, satanic rituals, and psychic visions at the heart of this truly twisted murder.