Geronimo Stilton (2009)

Season 1: Episode 7

When a 40-year-old letter arrives at Geronimo's house containing part of a map - and only a mysterious set of clues, Geronimo and company set off to track down the person the envelope was intended for all those years ago while at the same time following the map, which takes them half-way around the world in pursuit of what they think will be untold riches!