Accepted to the prestigious summer ballet intensive at Allegra Academy on scholarship, sixteen-year-old Mars Chang is thrust into the world of wealthy—and she’s determined to stay.

Mars’s annoyingly attractive roommate, Alex Bechler, has everything: she’s effortlessly cool and easily one of the best dancers in the school. Her big pharma family founded the academy and they’re on the verge of launching a new supplement, APL, to make them even richer. So when the head of the academy tasks Mars to secretly switch Alex’s supplements with APL in exchange for a chance at year-round enrollment, Mars agrees.

Since Mars already knows nothing at the academy is fair, she decides to help a fellow scholarship student by giving her some APL supplements. At first pills give the girl an instant edge in class, but when they also produce terrifying side effects, Mars suspects that APL might not be safe and that the Bechlers might not have Alex’s best interests at heart.

But how can Mars convince Alex that her leading role in the recital might literally kill her?