Five minutes before Grace Cahill died she changed her will. At her funeral everyone could choose to walk away with one million dollars or begin a very dangerous clue hunt which would reveal the source of their family's power. Amy and Dan Cahill (who are brother and sister) have chosen to start searching for the 39 clues around the world. Their first stop is Paris. The two of them head to the underground catacombs to search for clues which will lead to unimaginable power. There are four branches of the Cahill family, each with their own secrets, abilities and powers. There are the Lucians who are cunning and very good at keeping secrets. Janus have a love of art and are very smart. There are the Ekaterinas who can invent anything and the Tomas branch are very athletic and physical. This is the first book in a series of ten books where a clue to the Cahill family power is revealed as Amy and Dan continue on their clue hunt.
