A 90-year-old triathlete and an 83-year-old high jumper work to overcome serious physical injuries in order to compete in their events despite doctor's orders.

Mary and Bill is a film focusing on Mary Stroebe and Bill Wambach. Mary is a 90-year-old triathlete and Bill an 83-year-old high jumper who holds the National record in his age bracket. Bill was also named "Male Athlete of the Year" by the National Congress of State Games. Mary appeared on the "Regis and Kelly Show" and as a result was nominated for and received a "Relly" award. The film follows Mary and Bill immediately after they experience serious health related problems. Mary brakes her leg while down hill skiing and Bill, who had smoked for 45 years, suffers a heart attack. Despite these physical ailments, both decide to train and compete in their respective events. Mary hopes to complete the Lifetime Fitness triathlon and Bill will attempt to win first place in high jumping at the National Senior Olympics. Through their amazing commitment, both Mary and Bill prove that age is just a number.