It began with a strange new kind of cancer, born on the other side of the world. Eventually, it erupted on a British hospital ward... When a new cancer patient is brought into his care, Dr. Andrew Page assumes it'll just be another case of battling against the odds. Soon, however, he realizes that this new patient has been infected by a type of cancer that shows signs of intelligence. As the ward is put into lockdown, Dr. Page struggles to understand the nature of the disease. More and more people start to become sick, until finally Dr. Page has to face the horrific truth: a new strain of cancer has emerged, taking control of its victims' bodies and turning them into zombie-like creatures. For Dr. Page, this is a terrifying but fascinating new development. For the military, however, it means only one thing: the ward must be sealed, and the entire building - including everyone trapped inside - must be studied, observed... and then killed.