This is the sequel to Lies. Tartarus has risen again, taking Hemera and Akhlys power. Without permission of course. Only Leo Valdez knows how to stop the god of the pit, but can he find the answer before the Earth is lost to eternal darkness? Zoë is back with the Hunters, putting on a mask. Can she escape the clutches of Tartarus forever? Thalia has one month to go. If she gives Damian the stolen property, he will rise to power and most likely destroy the world. If she doesn't given him it, he will still rise side by side with Tartarus. Will she give it to him? And will the demigods save Olympus, their families and everything else they care about, or will Tartarus gain control of the world?