When the 7-4 investigates a fatal fire at a salon, Killian and Morales turn to a medical examiner with ties to Regina's past and fire marshal Nicky Greenville for insight; Haywood announces a new policy; Quinlan worries about Bentley's nightmares.

The team faces unexpected challenges while investigating the murder of a homeless man; Haywood and Dryden hit a speed bump in their relationship; Quinlan struggles with a decision at Ruskin Gardens.

Haywood’s leadership is called into question after a tragic shooting close to home, and her relationship with Suarez is put to the test.