A boy came into the building with an envelope addressed to the Special Victims' Unit. The boy accidentally got involved in a brawl between the detectives and a suspect. The boy was knocked out and taken to the hospital. Fin and Cragen came across the boy's envelope. Inside, they found pictures of a young boy dressed in his underwear. A note was attached that read, "Please put this sick bastard away". When confronted at the hospital, the boy who made the delivery confessed he was paid fifty dollars to drop it off.