Veterinary student BJ Vaughn, stunned by her mother's death and the terrible secret it revealed, is about to give up animal medicine. Then she is asked to partake in a very special - and mysterious - field expedition by one of her teachers. The patient is a unicorn, and the location is somewhere beyond the borders of this world. The place, called "Crossroads" is a refuge for creatures from many lands, some much stranger than the unicorn. BJ's work in Crossroads is complicated by the unanswerable questions in her own life, and by threatening attacks upon Crossroads itself by an ancient enemy. In the end, BJ and her companions must team up with the inhabitants to save the magical place, and in the process BJ discovers an unexpected solution to her own problem.