Walter, a 57-year-old man, has has been brought in to A&E suffering serious chest pains. Nurse Amanda Brown provides pain medication, but it is confirmed that Walter is having a heart attack and will need an air ambulance to take him to the mainland for vital heart surgery. Paramedics are called to Scalloway to reach an elderly patient who has fallen and hurt herself. It isn't the first incident, and she is having trouble taking medication. Consultant physician Professor Chris Isles is determined to find the answer. And nurse Marie Stemp and Dr Hazel Thompson need to improvise when a patient arrives at A&E with an injured foot. French fisherman Jimmy speaks no English, and the medics don't speak French.