Dash goes undercover to catch a woman suspected of having a vendetta against her sister's killers. Meanwhile, Agatha begins to set her own plans in motion.

Arthur and Dash team up to help a young girl in poor health whom they fear is the victim they see in their next vision. Although modern technology could save her, the community in which she lives prohibits the use of such equipment. When Vega and Agatha jump into the case, everyone must work together.