Essex and Herts Air Ambulance rush to help headteacher Andy, who has collapsed after a cardiac arrest at home. In Ipswich, warehouse employee Rob is trapped under a pallet of granite and needs the critical care skills of the East Anglian Air Ambulance Service to help with his broken leg. In Abingdon, the Thames Valley Air Ambulance team try to understand the cause of 13-week pregnant Katie's seizures and in Rayleigh the crew help Jo, who has been lying on her bathroom floor for nine hours with a broken ankle.