Elena, Fiona, and Marcus travel back in time to Mexico during the reign of the Aztec empire. There have been sightings of a powerful mermaid named Tlanchana, thought to be causing a devastating drought. The monster hunters learn about Aztec festivals, music, and culture on the streets of Tenochtitlan. Follow the team as they race against the clock to return a stolen crown to Tlanchana, known for being more wicked than sweet. Will she end the drought and remain hidden from the human world? This graphic novel includes monster profiles and survival tips as well as in-depth content on the social structure, government, and fashion of the Aztec Empire. Backmatter includes an activity page and character information.