While protecting egotistical transfer student Orion, Artemis makes a mistake that later provides her with the chance that she has both hoped for and dreaded, to prove her courage to herself and others at Mount Olympus Academy.

"The Underworld isn't really meant to be a fun place, but tell that to Hades! He loves the dark and the stinky smell of sulfure. However, there is one thing that Hades is not a fan of: dogs. And when Zeus and his fellow Olympians encounter Cerberus--a snarling three-headed dog--Hades must conquer his fears and tame the hound so that everyone can continue into the Underworld and deposit their Titan prisoner, Oceanus, back where he belongs!"--