Theo Gordimer is a classic thirteen-year-old coach potato: he prefers video games and TV shows to playing sports. Then his favorite aunt is diagnosed with cancer. Theo wants to do something to help her, but what? Then his friend Paul tells him about an upcoming five-kilometer road race to raise money for cancer research. Theo is panicked: running the race seems like the perfect way to help out his aunt, but 5K is more than three miles! Theo can barely run a quarter of a mile without having to stop. How will he be able to do it?