240 Teabags to Mongolia

We follow a journey of epic proportions in the trip of a lifetime for a young couple, as they travel from London to Ullan batur the capitol of Mongolia. They'll travel 10,000 miles, over mountains, through desert and rivers, passed corrupt police and bandits and all in a clapped out Peugeot 106 converted to run on vegetable oil.
Will they survive and more importantly will there relationship ?