Selina, a mixed-blood orphan from a tavern, falls into the sea during a tsunami—an event that inadvertently awakens the Crown of the Sea God. Viewed as a harbinger of calamity by the elders of the pure-blooded Elves, she is marked for sacrifice. Joining forces with allies—including the Elf Kairos, the sea dragon Noah, and her brother from the Abyss, Ryan—she uncovers a thousand-year-old conspiracy: the former Sea God had enslaved the denizens of the deep through bloodline shackles. Selina destroys the remnants of the old god’s spirit, abolishes the archaic doctrine of pure-blood supremacy, establishes the "Seven Seas Council" to ensure equality among all races, and sets sail to explore uncharted waters.
