Ruzek grapples with his father's worsening condition while Intelligence searches for an elusive serial killer.
An unexpected visitor causes disruption for Ruzek and Burgess amidst an emotional investigation involving an unidentified young girl.
When the only evidence in a crime is a church confession, Carisi must find another way to prove his suspect guilty. Benson agrees to meet with an old friend seeking to make amends for past transgressions.
