Molly hunts a serial killer who murders women. The victims are all individuals who remind the killer of her own abusive mother. Meanwhile, Molly introduces Dan to her family for the first time; and Becca makes plans for Hailee's quinceañera.

Molly works with a sexist, retired Texas Ranger after an arrest she makes leads to a tip about an unsolved murder he wasn't able to close. Meanwhile, Billy is forced to make a decision that could help capture a drug cartel leader but would also put his family's safety at risk.