With Covid sweeping the country, Paisley paramedics Peter and Gary respond to a man who is having difficulty breathing and who receives a positive Covid result while the crew are on their way to hospital. The paramedics must get the patient into hospital as quickly as possible while also guarding against contracting the virus themselves.At the ambulance control centre, call-handler Remi is also supporting people who are struggling to breathe. However, one of his calls is more surprising - someone requesting a taxi for a drunk friend.Meanwhile, in Dundee, Chloe and Fergie treat a woman who has overdone it working in her garden and is now experiencing chest pains. They also attend a man who is slurring his speech and appears disorientated. The crew suspect a stroke and quickly take him to hospital.In Melrose, Lee and Nadine treat a woman who has fallen down a flight of stairs while on holiday, while paramedics in Paisley attend to a woman with complex health issues, including severe pain in her legs.And in Coatbridge, Liam and Siobhan respond to a call from a concerned mother whose toddler has taken a tumble off a trampoline and bumped his head.