A microbiologist embarks on a journey to explore the cutting-edge science of longevity, investigating whether the aging process can be slowed or even reversed. Through interviews with leading experts and visits to innovative research facilities, she examines the biological mechanisms of aging, the potential for organ regeneration, and the ethical implications of extending human life. As she grapples with the personal impact of her partner's illness, she seeks to understand the future of human health and the possibility of achieving a state of agelessness.