Hilia's Help

For a time all is quiet for Hilia of Bacaria. She's teaching magic and trying to be a friend. Then word comes from Regia Evodi that there's trouble from south of Lergonia.

The old Regius of Largenna has died. His son has taken over, and is suspected of murder, even within his own household. His sister Theodi has fled to Lergonia to ask for help. Regia Evodi has called on Hilia to provide that help.

What can Hilia, a student, her friend Cloti, and Theodi do to bring down a Regius? How is Hilia going to be of any help this time?