Isaac is your typical 12-year-old seventh grade student. All he cares about is playing video games and hanging out with his friends. When cleaning the attic one weekend, he comes across a mysterious locked trunk and after finding the key, he accidentally releases a faerie named Cristo from a glass ball he found inside. When Cristo offers to do any three tasks that Isaac desires, he knows its his lucky day.

Isaac's good luck continues when he realizes he can release more faeries and they'll all do almost whatever he wants. Some might say he was selfish but Isaac was only ever concerned with having a good time.

After meeting Yara and learning he will have to recapture the faeries he set free Isaac fights back against his new role as a Light Keeper until he can't deny it anymore. Can this selfish and lazy boy with a penchant for lying become the hero his town needs? Or will the faeries take over?

All Yara has ever wanted was to the best Guardian she could be. She studied diligently under her mother, learning everything possible, until her mom grew ill. Once Yara realizes a Light Keeper needs her help, she can't believe she's stuck with Isaac. He's argumentative, impulsive, and won't take responsibility. How can she help turn someone like that into a hero capable of putting away dangerous faeries? Yara is tenacious and unwilling to give up. Where Isaac falls short, she steps in to take care of it herself.

Yara can always be found with her nose in a book or jotting down notes. While a part of her misses the childhood she never got of playing and going to school with other kids, she wouldn't trade her role as Guardian for anything. 

Cristo may appear to be an intimidating figure, but don't let that fool you. He cares about his family more than anything in any world and he won't let anything stop him from getting back to them.

Cristo is big on manners and enjoys conversation, but never lets on very much about how he came to be trapped in the chest. Isaac almost feels bad for the faerie after learning how many decades he'd been locked up. He wastes little time in issuing tasks for Cristo to complete so the faerie will be free to return to his family. When Isaac spots Cristo at the mall a couple of weeks later, he senses maybe the faerie wasn't everything he claimed to be.