Behind the scenes of a major UK hospital revealing the vast network of processes and people that work alongside the frontline medical staff. They include microbiologists, fighting infection on thousands of bed sheets, surgeons' scrubs, life-saving medical equipment and hospital surfaces. The film also meets the staff who care for the patients who do not get to go home - those who work in the morgue - and visits the hip bone repository, where one person's job is to grind human knee parts to save lives in spinal surgery