Inspired by her own experience of losing her father, Kara embarks on a journey to explore the booming business of life extension, including a challenging conversation with a man who has turned his "Don't Die" philosophy into a religion.

Kara investigates the techniques, trends, and fads shaping the longevity industry, separating snake oil from science-backed solutions and asking whether these innovations are truly effective - or simply luxuries reserved for the wealthy.

Following both biotech breakthroughs and the billions behind them, Kara explores the growing battle between public science and private tech power, and what it means for who gets to live longer and healthier.

Amid a growing loneliness epidemic fueled by social media and AI, Kara asks whether digital interaction and rising isolation are shortening our lifespans - and why human connection is one of the most powerful remedies for living longer.

Kara travels to South Korea to explore a health care system that combines preventative, accessible care with cutting-edge health technology, and asks what Koreans can teach Americans about living longer, healthier lives.

Kara investigates humanity's oldest problem, death, by speaking with believers, billionaires, and even an AI version of herself, asking whether immortality is a fantasy and if accepting mortality is the real secret to life.