The team is called in to investigate a string of murders in Walkerton, Indiana. There is someone lurking in the shadows. What happens when two agents go missing? Will the team find them in time? JJ/Hotch, Emily/Morgan, Garcia/Kevin

Emily and JJ are having a hard time understanding why their best friends are angry. Emily sees her abusive boyfriend again, and on her way home, JJ gets in a car crash. With both of the girls in the hospital, struggling to stay alive, Derek and Aaron see just how important they are.