Regina Haywood is promoted to be boss of the 74th precinct in East New York, where she must get her crew on board -- but some are skeptical of her promotion.

When a house party in Ruskin Gardens ends in murder, Morales and Killian turn to Quinlan for insight into her neighbors to help crack the case; Haywood takes on an unexpected new role; Suarez tries to help his brother with a challenging situation.

When a body is found at the construction site of a high-end housing development, the team races to find the killer amidst a contentious gentrification battle in the neighborhood; Quinlan's mother pays an unexpected visit.

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.