Erich Kastner wrote the story about a young boy who is drugged and robbed of some money which was pinned into his clothing by his mother. He is, of course, horrified, and rather than tell her the truth, he enlists the help of an army of young detectives. It reminds me of the pursuit of the psychotic child killer Peter Lorre in M, 1931. Later remakes are universally boring and tepid.