When a book of unexplainable occurances brings Petra Andalee & Calder Pillay together, strange things start to happen: seemingly unrelated events connect, an eccentric old woman seeks their company, & an invaluable Vermeer painting disappears. Before they know it, the two find themselves at the center of an international art scandal. As Petra & Calder are drawn clue by clue into a mysterious labyrinth they must draw on their powers of intuition, their skills at problem solving, and their knowledge of Vermeer. Can they decipher a crime that has left even the FBI baffled?