An eighteen-year-old girl named Kelly Maytia found herself in a world full of heroes and villains. A pixie named Caroh has offered Kelly to become the New York City protector, becoming Chocolate Girl!

Her job is to eliminate and defeat the purple alien monsters known as the Darkolo, and to defeat them all quickly before they revive their master, the planet-eating dragon Phiroxza, from his deep slumber once again.

They formed a team to defeat these creatures and defend New York. However, little does Kelly know, there is something that the ancient creatures and villains know, recognizing Chocolate Girl's moves and often saying, "She's back." There is a secret about Kelly Maytia's past that not even she knows about. Her new goal is to discover her secret past, to discover who she truly is.