in the three-stage race in the rockies, with mountain and prairie backdrops, the brothers compete against the world's top cyclists on dangerous roads at breakneck speeds. david crashes his bike at the end of the first stage and barely qualifies for the next round. marcus works out how much time david needs to regain and develops a strategy for the second leg of the race. during the race, it turns out that it is marcus, intending to hide his condition from his brother, who eventually suffers an aneurysm during the second stage and drops out.