Can flight paramedic Ray save the life of a high-country farmer with a dangerously blocked heart? Cam earns the trust of a toddler in trouble, after she suffers an allergic reaction. A volatile patient puts Taz and Amanda in the line of fire. Leonard and Nat treat a young Mum, terrified she's been bitten by a funnel web spider. Eamon and Mike help a woman with chest pains and breathing issues, but what's causing it?