Astrid Llewelyn has always scoffed at her eccentric mother's stories about killer unicorns. But when one attacks her boyfriend - ruining any chance of him taking her to prom - Astrid finds herself headed to Rome to train as a unicorn hunter at the ancient Cloisters the hunters have used for centuries. However, all is not what it seems at the Cloisters. Outside, unicorns wait to attack.
"Nice idea destroyed by sex crazed virgin"
Astrid Llewelyn is now a fully trained unicorn hunter, but she can't solve all her problems with just a bow and arrow. Her boyfriend, Giovanni, has decided to leave Rome, the Cloisters is in dire financial straits, her best friend's powers seem to be mysteriously disintegrating, and Astrid can't help but feel that her hopes of becoming a scientist are nothing but impossible dreams. So when she's given the opportunity to leave the Cloisters and put her skills to use as part of a scientific quest to discover the Remedy, Astrid leaps at the chance.