"Mary" and "Tom" arrive in New York from Ireland only to find that their uncle "Niall" isn't there to meet them. Indeed, the only acquaintance they do make make hanging around the docks is a small dog that she takes a bit of a shine to and names "Sparky". Concluding that he isn't likely to show up, they decide to take a punt and go to California and find him. Problem? Well the trains don't take punts - only dollars, so they have just an hour to raise the fare. Or... Well maybe they could just blend in with a group of travelling children and blag their way onto the train. It turns out that these kids are orphans too, being relocated to kindly families along the route. Except, perhaps, for the paralysed and wheelchair-bound "Nick" who isn't exactly top of anyone's adoption list. Between playing games with their new friends and avoiding the ticket inspector, they gradually make progress until disaster strikes. Disaster that puts them into the clutch of the deadly Cheyenne before befalling some even more ruthless bandits whose leader looks a lot like Lee Van Cleef, and who run a gold mine populated by slave labour. How to rescue themselves, their fellow miners, "Sparky", "Nick" and still find uncle "Niall" - well that's the fun part in this quickly paced and engaging big-eyed animation. It combines the intrepidness of the pioneering spirit with some good old fashioned wild west adventure scenarios and provides us with a little bit of "Temple of Doom" (1984) into the bargain. Apparently it's based on some real-life sibling experiences and readily passes ninety minutes raising the odd smile as we travel the breadth of a vast and untapped wilderness looking for a needle in a very large haystack.