It is the summer of 79 AD, and Flavia Gemina, along with her friends Jonathan, Nubia, and Lupus, embarks on a journey to the Bay of Naples, where they will stay with Flavia's uncle near Pompeii. Upon arrival, they are soon engrossed in a quest to solve a puzzle that may lead them to treasure. But then, tragedy strikes: Mount Vesuvius erupts, and the friends...