In Renfrewshire, paramedics Gary and Peter are on call on one of the hottest days of the year. They assist a man who has been out walking in the heat and collapsed at a bus stop. The crew must ensure his exhaustion isn't hiding a bigger problem.A toddler is assessed for suspected sepsis, and another crew work hard to find a man in trouble in the town centre. In Dundee, Chloe and Fergie respond to a call from a 94-year-old man who has suffered seizures.In Coatbridge, Siobhan and Liam treat an older woman who is plagued by gall bladder problems, and in Inverness, Ryan and Heather respond to a call from a man who has suffered a suspected stroke. Strokes must be treated quickly, and every second counts.In Skye, a young footballer suffers seizures after a clash on the pitch. Georgia and Paul must transport him safely to Raigmore hospital in Inverness.