Rachel, Bailey and the team head to Yosemite National Park where a maniac brutally killed a mother and her two daughters, and while circumstantial evidence points to a local outlaw biker (guest star Douglas Bennett), Rachel constructs a different suspect profile -- one who feels remorse and might have sibling issues. Meanwhile, George's lingering substance abuse problem causes a dangerous embarrassment for Bailey and the VCTF just as an attractive Congresswoman (guest star Erin Gray, ""Silver Spoons"") begins an investigation of the unit, and she is most impressed by Bailey. Back at home, Rachel's budding romance with her brother's (guest star Raphael Sbarge, ""Message In A Bottle"") drug counselor (guest star Joe Flanigan, ""Providence"") hits a snag.

A tormented Rachel must push aside her personal nightmares when she realizes that a disturbed child slayer (guest star Harry Groener, ""Buffy The Vampire Slayer""), whom she could not convict as a prosecutor years before, has resumed kidnapping young girls and putting them in gilded cages where he worships them as virginal ""princesses."" At the same time, Rachel is troubled by the sudden disappearance of her drug-addicted brother (guest star Raphael Sbarge) from a halfway house and her romantic relationship with therapist Tom (guest star Joe Flanigan, NBC's ""Providence"") enters a new stage. Also, George frets about the hot shot computer whiz (guest star Judith Moreland) who's temporarily replaced him while he's on leave due to his own struggle with narcotics.

Rachel and the team search for a serial killer who does not seem to follow a pattern following the abduction of a 10-year-old boy from a local diner. Meanwhile, Bailey must testify before a congressional subcommittee to save VCTF funding which is threatened to be cut off by Congresswoman Archer. Also, Rachel find that her apartment was broken into and the audiotape she made of Joel Marks confessing to planting a wire on her (in the Proteus episode) has reappeared in the court dockets where Marks is dismissed from the FBI and vows revenge against Rachel.