It's the hottest day of the year, and Wysocki takes over a case involving a murdered ice cream vendor, Colvin finds a new driver, and Alderman Gibbons asks Liam to help him help his constituents beat the heat.
The record-breaking summer heat and the likelihood of blackouts send the Chicago Police Department into the streets in full force to temper the city's escalating violence. Alongside her new driver, Superintendent Teresa Colvin finds herself back in the field while Detectives Wysocki and Evers take over an emotional case in which a son witnessed his father's fatal shooting. Meanwhile, Alderman Gibbons enlists Liam to help keep his constituents cool.—Fox Publicity