“Little Mother Coralie is threatened with a fresh danger…” When Captain Belval rescues his nurse Coralie from tragedy, they are thrown into a conspiracy involving murder, money and bags of gold. Arsène Lupin, disguised as Don Luis Perenna, returns to get to the bottom of all their secrets and more importantly, get his hands on some of the gold. With danger lurking at every turn, Maurice Leblanc puts his master thief up against some of the most dangerous secrets yet.