Mia doesn't have much time. Soon, Hades will take over Olympus and it'll be game over for everyone. Mia and her cousins race to try and restore everything to the way it was before, but with each second, there is another problem. Through betrayal, heartbreak, and near-death experiences, Mia has to go through before Olympus falls into the control of the Underworld. Horrifying truths are revealed, and friendships are tempted. Will they make it before everything is over, or will the world as they know it change for the worst