Randy [Rainn Wilson] and his partner Mike [Lil Rel Howery] spend a grueling 24 hours on Ambulance #42, a shift that lays bare how overworked and overlooked they feel within the fast-paced world of urban emergency care. The nightly routine blends the constant hum of sirens, hospital corridors, and split-second decisions, pushing them to stay sharp even as exhaustion wears them down. As the clock ticks, their patience is tested by demanding calls, difficult patients, and a mounting sense that the system often underserves the very people it aims to protect.
Seeking a change of scenery, Randy interviews for an insurance desk job. He hopes this could be the escape from night shifts, but it seems he didn’t land it. Shanice [Yvette Nicole Brown]—a strict supervisor who keeps a tight lid on protocol and efficiency—assigns a student ride-along, Jessica [Aimee Carrero], to shadow the crew and witness the realities on Ambulance #42. The night hardens into a test of endurance, not only for Randy and Mike but for Jessica as she observes the pressures of life-and-death decisions on the front lines.
Six hours into the shift, a phone call shifts the mood: the insurance job offer appears to be theirs, and Randy is momentarily buoyed. Yet Shanice makes clear he must finish the shift before moving on to the new role. The remainder of the night unfolds with a string of harrowing moments: a man with a stick lodged in his eye, the heartbreaking death of an 11-year-old boy after arrival at the hospital, and a tense encounter with a mentally disturbed patient who believes he is the President of the United States. The danger escalates to a point where both Randy and Mike face life-threatening risk, testing their resolve and teamwork.
Jessica's initial skepticism about Randy's decisions gradually softens as the hours pass. With 18 years in the field behind him, Randy’s experience begins to explain why EMTs do what they do, and Jessica grows to understand the human cost behind every call and the steadiness required to keep people alive when the odds are stacked against them.
Toward the end, the crew responds to a severe car crash and becomes the first to rescue a mother and her baby. They are labeled Priority 1 on the scene, and Randy chooses to divert to the nearest hospital rather than the university hospital as instructed, a choice that underscores the urgency of real-world decisions in emergency medicine. On arrival, they encounter resistance from the hospital staff, and the tension peaks until Jessica reveals herself to be the new ER resident, adding a new layer of authority to the room. Rob Riggle appears as Chief Dr. Serrano, whose reprimand is tempered by the evolving understanding among the team.
The night winds down with a mixture of celebration and somber reality. Randy receives a heartfelt farewell from his colleagues and supervisor as he transitions to a new insurance role. Yet the slow, orderly pace of office life proves to be a poor fit for someone accustomed to the immediacy of the field. In a quiet, stubborn moment of clarity, he realizes his true calling remains in the chaos and rush of emergency care, and he ultimately leaves the desk behind to return to the paramedic role he loves. The film treats this arc with a grounded, respectful tone, emphasizing the humanity at the heart of frontline medical work and the personal cost of choosing a life saved one call at a time.
