The Knights of the Abyss are still causing chaos in Atlantis. They threatened that if Trey Atlas doesn't relinquish his throne, they'll light the Echinodea--a magical lantern that could expose the island to the entire world. But if Trey steps down, the Knights would take over Atlantis and destroy everything it stands for; including erasing Trey's mysterious past. So there's only one option--get to the Echinodea before the Knights of the Abyss. While on their search for the Echinodea, Trey and his Royal Court meet someone who claims to have the information Trey seeks about his biological family. But the key to the mystery isn't what he hoped it would be. It turns out that the secret in Trey's blood could steal the very throne he fights to protect.

Sixteen-year-old Trey Atlas' known life is a lie. While he was raised in Miami, Trey was actually born in Atlantis. Sent off the legendary island as a baby for his own safety, Trey is the only living heir to the Atlantean throne. Whether he likes it or not, Trey has to go back to his birthplace and accept his role as the Ruling Prince and lead the revolution to defeat the Knights of the Abyss. Otherwise, thousands of innocent lives and his true family legacy could be lost forever.