The inside story of Mark Beaumont's extraordinary solo attempt to smash the Guinness World Record for cycling around the world. Arriving in the USA, Mark celebrates his 25th birthday in LA but has to endure sub-zero temperatures instead of basking in the sunshine. After suffering a crash and a mugging on the same day, he struggles to find the strength to pedal on to Florida. Before him still lies the final 'sprint' from Lisbon to Paris. Can he make it back to Paris in time to claim a new world record?