On a hot summer night in Springfield, Massachusetts, a seemingly routine traffic stop turns into a nightmare when officers unknowingly apprehend a serial killer and discover a torture chamber and several murdered women in a quaint suburban home.

In 2021, in a Norman, Oklahoma basement, police unwrap the gruesome contents of a suspicious box.

In June 2001, just outside Rockford, Illinois, a welfare check leads police to a woman brutally murdered in the basement of her once quiet suburban home; the hunt for her killer will lead detectives to a mystery that has been buried for over 14 years.

In Youngstown, Ohio, in 2017, an unsuspecting married couple discovers body parts in a mysterious locked freezer that someone has put in their basement, unlocking a harrowing mystery surrounding a missing woman and a tragic love triangle.

When friends find Brad McGarry shot to death in the basement of his Bellaire, Ohio home, evidence suggests a robbery; when detectives learn that Brad is an openly gay man working in the world of coal mining, a more complicated motive emerges.

Police unlock a missing Michigan man's cell phone to discover clues to his whereabouts and find him hanging in a basement dungeon.

In 1978, a shocking murder in broad daylight terrifies a small Illinois town; it goes unsolved for years, until an elite team of investigators uses cutting-edge technology to dig up new clues and lay a cunning trap to catch a killer.

When 31-year-old Ashley Young doesn't call her mum for days, her family and friends fear for the worst. And when a 911 call triggers a gruesome basement discovery, those fears come true.