Supervisor Charline Polk leans on her 16 years of experience to handle crisis after crisis, but when she answers the phone to an open line and screaming in the background, she is faced with a situation that chills her the bone.

911 Dispatcher Abby Encarnacion is pregnant with her first child and must navigate working 12-hour shifts, taking highly emotional calls, and instructing CPR to a mother who discovers her son is unresponsive.

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.

With July 4th just around the corner, the dispatchers brace for nonstop complaints and hope for the best. When a block party breaks out in a fight, the dispatchers scramble to get the officers the details they need before it turns deadly.