The RTS Award-winning documentary series returns for a new run following patients treated in the same 24-hour period at St George's in southwest London. The hospital has one of the busiest A&E departments in Britain, which is under more pressure than ever. It's a place where stories of life, love and loss unfold every day. This episode follows staff as they unravel the mystery of an unknown patient who arrives after collapsing and falling face first in the street. The team manage to contact his two daughters as they race to find out what may have caused him to fall unconscious. Twenty-nine-year-old Rick comes to minors after an accident at the gym, and three-year-old Marigold, who has signs of a chest infection, is in paediatrics with her mum Helen.