Emergency nurses fight to revive a woman in cardiac arrest; a patient with terminal lung failure undergoes a risky lung transplant and a breech birth has midwife Lucy braced for resuscitation.

Emergency nurses fight to save a man whose gone into anaphylactic shock. Transplant nurse Rodrigo leads a mission across Australia to retrieve a donor heart.

Father-of-three Chris undergoes high risk brain surgery and mental health nurse Kate is called into a police station to treat a confused woman at risk of self-harm.