Doctors, nurses and drivers of a special mobile service unit navigate personal and professional dramas while burdened by the responsibility to prevent others from dying.
Manu, a rookie nurse, gets an internship at Unit 53, led by Dr. Irene. They respond to an emergency in a community, where a van has crashed into a small bar.
A congressman suffers a heart attack while having sex with a prostitute. Dr. Pedro, Manu, and Vandam are called to a hotel to treat him, but when they arrive, they are met with an unfortunate surprise.
Dr. Glória is forced to confront the ghosts of her past when she has to find a hospital bed for a hit-and-run victim at a public hospital where she used to work.
While treating a woman who was beaten by her husband, a jealous military officer, Átila is forced to confront past traumas from his time as an army nurse on a mission in the jungle.
Dr. Pedro, a bipolar surgeon, is reminded of his childhood with his sick mother when he responds to a call involving a boy who finds his mother unconscious in an apartment.
After escaping from prison, Vandam's father, Marcelo, carries out a wild plan: he and his criminal accomplices invade Unit 53 and take the entire team hostage.
While responding to a case involving a deranged man who stabs a groom and takes the bride hostage, Manu is reminded of her brother, who was kidnapped, and the nurse who cared for him.