A man collapses in a doctor's office from cardiac arrest. Minutes later a team of paramedics, including trainee paramedic Evan, are at the scene trying to get the man's heart to beat. If Evan is to qualify as a fully-fledged paramedic, he must perform in these life and death situations. Out in Sydney's west, it's Christmas Eve. It's Jenna's first experience of working alongside Santa. A street party turns ugly when a man is glassed and Jenna and mentor Cleone arrive to pick up the pieces.