A medium approaches Danny and Baez claiming to know what happened to a woman who was found dead of an apparent suicide. Also, Jamie and Eddie help a woman who bought cheap insulin online that nearly killed her son; Frank goes against the wishes of the archbishop to take down a man he believes is laundering money from a charity; and Erin's ex-husband asks her for help with an assault and robbery case.

While off duty, Danny encounters a gas station robbery in progress and is forced to use his weapon, leaving him shaken and his family and co-workers concerned. Also, Eddie apprehends a turnstile jumper who pleads for leniency by offering information on a missing weapon that's vital to one of Erin's cases, and Frank learns that a top officer in his department has a dark past.