A large inheritance is up for grabs–and a murderer on the loose–in this thrilling mystery featuring French gentleman burglar Arsne Lupin. A wealthy man named Cosmo Mornington leaves a large inheritance to any living heir that can be found and names his dear friend Don Luis Perenna as executor. But when Perenna is none other than Arsene Lupin, will the heirs be found? Especially when the will states that if no heirs are found in three months Perenna will inherit the hundred million francs. In the race against time, heirs found seem to be turning up dead at an alarming rate.