A cell lives an average of 5 minutes. A hummingbird for 5 years. Right now, humans live for about 75 years. What might it mean to live forever? Director Mark Wexler embarks on a worldwide trek to investigate just what it means to grow old and what it could mean to really live forever. Documents his journey as he seeks to learn if eternal life is possible or even desirable. Exploring these issues with a fascinating array of people.