Brennan and Booth stumble upon a subterranean world of homeless people when they find the remains of a filmmaker in the ventilation shaft of an underground tunnel.

Briscoe and Green believe a 10-year-old is responsible for a child’s death, and McCoy wants her isolated to stop any future fatalities.

After Stone accepts a plea bargain from the much younger and poorer lover of a wealthy older woman found murdered in her apartment, he begins to have doubts that he…