An American traveling in Europe suddenly disappears, and his daughter, married to an eminent scientist, receives a letter asking her to go to Antwerp, which she does with her young son. Both are about to disappear. OSS 117 is asked by his superiors to solve these mysterious disappearances.
Hubert Bonisseur de la Bath, alias OSS 117
Muriel Highball
le lieutenant de W.
Mathieu Weber
Claus
1er officier russe
Le gérant de l'hotel
Le professeur Beck
2e officier russe