In a series of letters to his grandson, an elderly gentleman relates how he and his remarkable little dog traveled to America on an expedition to the Wild West to find the dog's grandfather, rumored to be living among cowboys following a successful movie career. travels to America's Wild West A series of letters from Grandfather reveals his adventurous trip to America with his remarkable little dog Roo, in search of Roo's grandfather, rumored to be living among cowboys following a successful movie career.