In this final book of the Ingo series, Sapphy and her brotherConor have been called to take part in the ancient and dangerouscoming-of-age ritual known as the Crossing of Ingo. It'sa trial for even the strongest Mer-and Sapphy and Conor willbe the first of human blood ever to make an attempt. However,not everyone is happy that Sapphy and Conor are joining inthis ancient Mer tradition, particularly Ervys, whose influenceamongst the Mer is increasing daily. Ervys wants to cleanseIngo of all mixed blood and will stop at nothing to do so. Hewill use every trick-everything in the sea-to make sure Sapphyand her brother do not return. The Crossing of Ingo is notjust a rite of passage for Sapphy, Conor, Faro and Elvira; it's amatter of life and death.