Xander Stone didn't believe in unicorns — until one puked on him! In this adventure, twelve-year-old Xander first meets the Rainbow-Barfing Unicorns — stinky, zombielike, upchucking creatures from the magical world of Pegasia. They've been banished to Earth for, well, being stinky, zombielike, upchucking creatures. However, Earth presents them with a great danger: HUMANS. Luckily, the dashing, naively heroic Xander vows to protect them and their disgusting secret at all costs.