Harlee and Tess intercept a heroin shipment from a local drug lord who discovers Wozniak's secret and tries to use it as leverage to get his confiscated drugs back. Harlee fears Stahl's interest in her goes beyond the professional, believing that he is invading her privacy, and resorts to spying on him with the help of an old friend. Tess tries to use Espada to get back at her husband.

Wozniak grapples with his guilt over attempting to kill Saperstein as he is faced with the need to finish the job. Harlee desperately tries to protect Saperstein as she struggles to keep the unit from being torn apart by suspicion and grief. Stahl gets closer to uncovering Harlee's relationship with Miguel.