All Medusa wants is to be more like her two sisters and the other kids in her class: immortal. As the only mortal at Mount Olympus Academy, Medusa is sick and tired of being surrounded by beautiful, powerful, immortal classmates. It isn't easy making friends, especially when you have snakes for hair and a reputation for being mean.

Immortality, she thinks, will solve everything. So when Medusa finds out about a necklace that promises just that, she's sure it will help her get the two things she covets most: to be as popular as the four Goddess Girls, and to have her supercrush, Poseidon, finally notice her.

But when the necklace brings about popularity in the totally wrong way, things go from bad to worse. Can Medusa overcome her "meanie" status and prove that there's more to her that meets the eye?