When a deadly virus returns to wreak havoc across the planet Solaerys, seasoned depth-hunter Dav'ian follows up on his late father's investigation into a disturbing inter-clan conspiracy. His estranged daughter Alv'a discovers she's been infected and has mere weeks to live. Dav'ian's race against time accelerates as he scrambles to get Alv'a healed and restore his clan's honor.
The events from the Prologue that led up to the Ax'ad clan's banishment from the Vaenin High Order, now from the perspective of the Vaenin. Kemva'r battles a massive deep sea titan during his mission to rescue the stranded hunters and retrieve the crystal that eventually saved millions of Solaerian lives. J'enna disobeys a direct order.