In March 2020, Gretchen Anthony disappears after texting loved ones that she was diagnosed with COVID-19; when a search of her home suggests foul play, investigators rely on recorded jailhouse phone calls to unravel the mystery of what happened.

For over a decade, a twisted web of secrets and lies conceals the identity of the person who heartlessly murdered a selfless mother of three; when the truth finally comes out, the revelation stuns the family, the community and the investigators.

Kim Boone and Anita Smithey have much in common. They're middle class moms in their 40s. And both attempted to kill their husbands. Jail calls between the two reveal their inner thoughts on love, men and the circumstances that landed them in prison.

An unknown killer tortures and murders a couple in January 2011; DNA links an unexpected suspect to the crime, and investigators must rely on recorded jailhouse phone calls to gather solid evidence and bring the culprit to justice.

Sixteen-year-old Mujey Dumbuya turns up dead four days after leaving her home to go to school; police across multiple jurisdictions unite to uncover the tragic truth behind her murder, and jailhouse calls provide the clues to catch the killer.

John Peek's first wife died in an apparent burglary. Now years later, his second wife is killed. Police must determine if it's just a terrible coincidence. Jail calls, hidden wire conversations, and years of detective work finally reveal the truth.

The burning body of trumpet player Scott Sessions lies smouldering along a mountainside road. An investigation uncovers three potential suspects, plus another dead body, but calls from an inmate at the Weld County Jail reveal the true killer.

Fishermen find a 27-year-old man shot to death on a river embankment; a key suspect leaves investigators guessing before jailhouse calls reveal the truth of a twisted love triangle that ended in murder.

A distraught husband cannot locate his wife. Police discover a videotape, and the grainy footage points to a grisly demise. The killer's jailhouse phone calls threaten to widen the circle of fatalities in this quiet South Eastern, Florida, community.

In 2017, Julii Johnson lay dead in front of her boyfriend's home in Warren, Michigan. All evidence seems to point to the boyfriend. As detectives dig deeper, they uncover a complicated plot, and no one is talking except on the jail phone.

Newlyweds Tony Cooper and Melinda Kotkins of Gresham, Oregon, are executed. Jail calls during Tony's previous incarceration yield many suspects, including men in love with Melinda. The killer seals his own fate thanks to a jail call to his wife.

William Hargrove loves both Anna and Michelle. When Michelle tells him he has to choose between them, he picks her -- and Anna winds up dead. He claims to love Michelle so much, but his phone calls hint at her possible role in Anna's murder.

When a former crime reporter is found murdered inside his home, investigators eye his spouse and his neighbours, until intercepted jailhouse calls reveal the true killer.

When a ranch hand is found dead in a river outside of Salt Lake City, investigators across two states must work together to catch the killer; searching for the truth uncovers a trail of fraud, deception and adultery, shocking a small town in Nevada.

In December 2001, the brutal murder of Robert Fingerhut, the respected owner of two bus stations, spurs an investigation that reveals a sordid relationship of lust, lies and murder; jail calls hold the killer's secrets.

When a young mother of three vanishes on Mother's Day, police race to find her. The search grips the entire community, but no one is ready for what it will uncover -- 20 years of lies and violence and a potential serial killer hiding in their midst.