What happens when your imaginary friend turns into your imaginary enemy?

Like many kids his age, Chad has an imaginary friend. His friend was Pingo. The two would fight ninjas, brew magical potions, and float in zero gravity. Each day was a fun-filled adventure, until Chad decided he was too old to have an imaginary friend.

But Pingo wasn't ready to leave Chad alone, and started tormenting him and causing all kinds of mischief. Can this once inseparable duo ever be friends again?