Behind the scenes at the world-leading Royal Marsden Hospital, as surgeons attempt pioneering cancer treatments, including a high-risk bid to save a woman's voice box.
Peter has a fast-growing tumour and needs throat reconstruction in order to save his life; Janet's pancreatic cancer is wrapped around a vital vein.
A patient with throat cancer needs a new windpipe to save his voice; a rare cancer means Melissa's entire reproductive system must be removed for her to stay alive.