Roman mysteries

Ten-year-old Flavia and her friends encounter the Roman admiral Pliny before making a journey to her uncle's farm near Mt. Vesuvius, where they try to solve a riddle, reunite a family, and get out of the path of a natural disaster.

In Rome in the year 79 A.D., a group of children from very different backgrounds work together to discover who beheaded a pet dog -- and why.