Based on actor Chris O'Dowd's childhood experiences in a small Irish town and adapted from O'Dowd's starring role in "Little Crackers," "Moone Boy" tells the story of young Martin Moone and the adventures he has with his friend, Sean Murphy (O'Dowd). However, Sean isn't a normal school-age pal; he exists only in Martin's imagination. But he's still able to help Martin survive as the youngest in a flighty family that includes his parents, Debra and Liam, and a trio of loud sisters. Martin's fantasticl imagination surges in a variety of animations from the Oscar-nominated studio Cartoon Saloon, as well as in ridiculous schemes he creates -- against Sean's better judgment.