Eight-year-old Abby has had an accident at a diving pool and needs to have her head and neck scanned for serious injuries. Worried mum Nikki puts on a brave face while doctors perform tests, but dad Scott is stuck hundreds of miles away in Scotland. Meanwhile, Anne and Holton - part of a security team dealing with more than 50 incidents a month - encounter a variety of challenging patients on the night shift at King's College Hospital in London