If you were about to die, how would you live? Kiwi David Downs had just months to live when he entered a clinical trial of an innovative cancer treatment called CAR T-cell therapy in Boston. Within weeks, he was in complete remission, and two years later he is deemed cured. Now, he has dedicated himself to helping others in Aotearoa NZ facing their own cancer journeys. With him, we follow their stories of life and death while exploring the fascinating science and history of this groundbreaking treatment.