Two overly imaginative pranksters named George and Harold hypnotize their principal into thinking he's a ridiculously enthusiastic, incredibly dimwitted superhero named Captain Underpants.

Exiled artist and poet Mustafa embarks on a journey home with his housekeeper and her daughter; together the trio must evade the authorities who fear that the truth in Mustafa's words will incite rebellion.

A brother and sister are confronted by a malevolent supernatural entity...