Abby navigates being a new mom in a new supervisor; as she oversees the room, her skills are tested when a welfare check spirals into a pursuit; when reports of a juvenile with gunshot wounds come in, Abby faces a mother's worst nightmare.

The shift is showered with food and fun during Appreciation Week, but the calls keep coming, including a robbery in real time and reports from the gruesome scene of an accident; dispatcher Tiffany Ward wins an award for a call from the previous year.

Dispatcher Arnold Rinas taps into his 15 years of experience to prepare the new trainees for the job; he helps newbie Salena Hall navigate 911 and must deescalate a dangerous dispute when a neighbor pulls a gun on the caller and her family.

The team honors their partners and is reminded of the danger police face daily; Savannah Brown, the youngest dispatcher at CVD, is eager to prove herself in front of her experienced colleagues.

The dispatchers brace for non-stop 911 calls as Memorial Day weekend ends with chaos; while the team handles a household shooting and a pursuit that becomes a standoff, supervisor Charline notices one of her own hasn't shown up and fears the worst.