Paifu, a half-vampire, half-werekoala, constantly gets into trouble with his best friend, the ghost José. But when the Monster Flu sweeps through town, the fun and games come to an end. If the monsters do not obtain the medicine soon, everyone will die! With all the adults ill, it is up to the children to save the day. Paifu and José embark on a grand adventure, but will they secure the medicine in time... or will they fall victim to it themselves?!