How do you kill someone who cannot die? The wrath of Poseidon is falling upon land and sea. In Mera's search for a way to destroy him, she returns to the kingdom she once abandoned. Atlantea. Meanwhile, Bast tackles the frail political balance in Tagrad, and tries to regroup with his soulmate. He will do anything to see Mera again, and she will do anything to protect him. Even if the price might be her own life. The stakes have never been higher, and the fall has never been steeper. Poseidon is here. And it's time to end it all.