Andy's undercover skills are put to the test when she's brought in to pose as a prostitute during a citywide sting operation. But a bid by Andy and Dov to impress Sergeant Boyko with their initiative backfires when the two rookies put a vulnerable informant's life in jeopardy, and it's left to Andy to infiltrate a risky gun deal in progress to save her.

A fatal traffic accident involving an elderly man and a cyclist may not be as open and shut as it seems, and Andy's romance with Detective Luke Callaghan also seems headed for a collision after she objects to how he handles a young murder witness with a bullet lodged in his head.