“Nightwatch” chronicles the sacrifice and heroic work of the first responders in New Orleans, a singular city filled with rich culture and a vibrant community. The robust team of EMTs and EMS paramedics embrace new partners and roles as they respond to everything from medical emergencies to on the street violence to natural disasters. While the rest of the city sleeps, the medics of NOEMS take on the harrowing overnight shift to keep the residents and visitors of New Orleans safe.