"Agent Luna has been undercover at Nobel High School for most the school year ... With her secret [identity] on the verge of being exposed Luna begins a dangerous alliance with Jonah --who may also turn out to be her first boyfriend"--Cover.

Two young witches are sent to the human world to collect and crystallize hearts. Whoever comes back with the most gets to be queen of the magical world. However, they must watch out and not give their own hearts away.