Two tenacious sisters determined to fulfill a promise investigate the mystery surrounding their mother's death.

Beth Lochtefeld had everything -- except the one thing she longed for --true love. And then she met her soul mate.

Surprising evidence is uncovered that sheds new light on the fire that killed Shay

The search for the serial arsonist leads Severide to meet face-to-face with an old enemy.

An overprotective mother claims that her daughter with Down Syndrome became pregnant after being raped.

A murder in a church leads Benson and Stabler to an alleged cover-up involving sexual abuse by a priest.

Halstead goes undercover at a corrupt treatment center for troubled young girls.

An investigation is blocked by a church offering sanctuary to the primary suspects.