Behind the beautiful image of the cover of the book hides an adventure full of sensitivity, which should appeal to young readers open on distant cultures. 200 pages diving Saigon in 1930, which has changed since without denying its past, to the image of the Vietnam of today. Far from rushing readers with the history of Franco-Vietnamese relations, the author proposes a charming adventure around the dune sensitive girl main character, open to a colorful world, changing, but the understanding of which is opaque to the uninitiated, a situation that has no changed a century later. Sy plate dynamic investigation, with the table background dopium traffic, one of the leading advantages of the ancient French colony. Through short chapters, easy to read, author that bring the reader to follow different characters in a multifaceted investigation and smiles, in a dull anxiety but without violence in words. The suspense is maintained and, thanks to Heaven and friendship between young people so remote cultures, the villain is unmasked. Some regrets though: - This beautiful story deserved a map to locate this distant country, some drawings to illustrate the many scenes so colorful and ethereal world of dopium dens lIndochine house exudes. The look of the young reader would have been informed; - One of the hero, a young sailor, saw his rank (lieutenant) equated to that of "lieutenant". Or in the "Royal", a lieutenant is equivalent of a captain (even in our 21st century!). The author should have retained full lappellation, important in the hierarchy of his characters; - Finally, the last column of the journalist, also key player in the adventure, is dated incorrectly; the action, which began in mid-January 1933, can not finish a January 2 of that year. We forgive this striking shell, but it comes at the very last page! In the balance sheet, read with interest and certainty not to be bored!