Three hairy characters called Busbys live on an isolated peninsula. Their names are Offal, Giblet and Polyp.

Giblet records the sounds of objects to understand how they relate to thoughts, Polyp experiments with the magical effects of furballs and Offal plays with oversized fungi by the sea. After playing with a particularly potent fungus Offal gives birth to a large, intelligent hairy slug and names it Oscar. Meanwhile, Giblet has developed a brain portal machine and, in league with Polyp they trick Offal and take control of his mind.

But do they really understand the consequences of their actions, and what is Oscar trying to tell them?