With the majority of the Olympians reunited on Olympus, the Titans continue to wreak havoc on humanity to lure them into a fight. But the Olympians aren’t ready. With little memory of their past lives and limited control over their powers, their best chance is to recover the primordial weapons: the trident, the thunderbolt, and the helm. With their powers, the Olympians might be able to make up for their inexperience and stop the destruction of the Titans.

As their search begins, the remaining earthbound Olympians are still learning who, and what, they are. Seeking to join the others on Olympus, Xenia ends up in the Underworld to ask Hades to take her there. But he has other plans for her. Deep in the Underworld is a monster that Hades believes is what killed them in their first lives. His proposal: Befriend the monster, and he will take her to Olympus.

While a monster with incomprehensible strength grows a little too attached to Xenia, Ethan, Vienna, and Griffin encounter a second Hermes and realize there's a traitor in the group. Problem is, they're a little kidnapped at the moment and aren't able to send a message to their friends on Olympus.

The Myth of the Godslayer is the sequel to the Legend of the Solstice.