Jimmy and the Bluebottles

Jimmy is a nipper in the lifesaving club where his father was once club champion. The coach wants Jimmy to swim but he doesn't really want to when in a practice race he is badly stung by bluebottles, a type of jellyfish. But then younger brother Josh is caught in a strong current and there is no one else to save him. When Jimmy overcomes his fear and saves his kid brother he is determined to show what he can do, and enters the race behind the others, now what will happen?