A frail, asthmatic young Theodore Roosevelt transforms himself into a vigorous champion of the strenuous life, loses one great love and finds another, leads men into battle and then rises like a rocket to become the youngest president in American history at age 42. Franklin Delano Roosevelt, brought up as the pampered only child of adoring parents, follows his older cousin’s career with worshipful fascination and begins to think he might one day follow in his footsteps.