Donny is 12 and Katie is 10. Their mother is sick and cannot look after them. They must fly half-way around the world, by themselves, in order to live with their uncle. This proves to be quite difficult because they are only kids and have only traveled with adults before.
It becomes more difficult when they miss flights, get locked out of their hotel room, lose their passports as well as get into trouble with the police.
Throughout their journey, they have many adventures and challenges. Donny and Katie learn how to help and support each other in every situation that they find themselves, and they find themselves in many strange, difficult and odd situations.