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.

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.

In her first week as supervisor, dispatcher Marra Wargo leads the team through a storm of emergencies, panicked witnesses, and a dog in danger.

911 Dispatcher Jackie Chappuies takes training rookie Hayley Kilbane into her own hands; together they face back-to-back carjackings at the same gas station and a possible overdose that calls for immediate CPR.

Supervisor Christine Mooch Muccino drives the shift through a series of crises including a fatal car accident and a horrific shooting in broad daylight, but nothing shakes her to the core more than when she learns of a crisis at home.

The dispatchers at CVD brace for Full Moon madness; everything breaks loose throughout the night when a traffic stop turns into a full-blown pursuit, strange lights in the sky are seen, and a major accident leaves a motorcyclist motionless.