Twelve-year-old Tulsi is airlifted to St George's after falling from a cliff near her home in Hastings, 70 miles away. Clinical director Phil orders urgent CT scans as soon as Tulsi arrives so that he can assess the extent of her injuries. They reveal that she has a subdural haematoma: a clot of blood in her head, which is expanding, putting pressure on her brain. Tulsi needs emergency brain surgery.