Laboratory rats Mike and Phil enter a love triangle with an imaginary friend; two fleas ponder life while stuck on a monkey's back; an algae questions its existence.
A teenage pigeon's jealousy over his angelic little brother leads him on a wacky spirit quest that teaches him about courage and responsibility; two foxes rap about their tough life on the city streets.
Roaches targeted for extermination venture to the outside world to guarantee the survival of their species; a group of seagulls ensnared in a piece of litter struggles to live as one.
Mike and Phil go into business with fellow rat Simon (Thomas Middleditch) after discovering a secret of his. Elsewhere two bees Todd (Jon Daly) and Stan (Tim Heidecker) find out the secret of pollunation.
