Operating a private ambulance is a family business for the Ochoas—a necessary evil in a city where the government funds only 45 ambulances for a population of nine million. In cinema verité style, American documentary filmmaker Luke Lorentzen shows us what Juan and his family members go through night after night: from the silences before the storms to the intense, heart­ pumping moments as they risk life and limb careering through the streets of the metropolis. Lorentzen brings it all up