A Libertus Mystery, set in Roman Britain - Libertus is at a society wedding on behalf of his patron when the father of the bride is poisoned after testing the wedding wine. Pompeia, the bride, declares that she has caused the death, but Libertus is retained by the bridegroom to prove her innocence. His investigations uncover hidden tensions, and when another guest is discovered murdered at his home, events take a different and more sinister turn . . .