Philadelphia police officers find four adults locked in a filthy basement dungeon.

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.

Two wives are found dead in their basements, and the investigation reveals connections to their husband's first wife's death in 1987.

A well-known community activist is brutally murdered in his Washington, D.C. home, creating a race against time to catch a killer.