Still Waters — Marilyn Todd

For High Priestess Iliona, unparalleled happiness would mean staying in Sparta, but Lysander, head of the secret police, needs her help to track down some stolen gold. The trail leads to a new lakeside posting station--which proves to be a hotbed of adultery and lies. Iliona's arrival coincides with the seemingly accidental death of an Olympic wrestler, but she soon discovers that out there a secret shared means a death warrant signed, and that betrayal can come from the unlikeliest of sources . . .