Father Paul Vecchio goes to Harry for help after hearing a penitent confess to murder. He can't identify the murderer or go to the police because to do so would be breaking the seal of the confessional. He does, however, reveal a clue - the murderer had recited a verse of poem. Harry figures out from the clue where the crime might have taken place and he's right. Soon, there's a second body. Harry's investigation uncovers who the killer is, why he's killing, and culminates in the resolution of Father Paul's crisis of faith as well as the takedown of the murderer.