Feature version of the 1934 movie serial of the same name, never exhibited in the USA.

Two Boy Scouts win an around-the-world trip with a crack aviator, and find themselves crash-landed in the South American jungles after the ace forgets to refuel in Ecuador.

The former Jo March and her husband Professor Bhaer operate the Plumfield School for homeless boys. One of the boys, Nat, invites Dan, a street kid, to come to the school, where the boys are all loved and well cared for. Dan is a young tough, but his heart is good, and when he is accused of theft at the school, Jo continues to believe in him and that the true thief will be found out.