Dreaming of adventure, city mouse Gavin and his buddy Matthew join a crew of Ship Mice ready to set sail -- just as young Chester bursts in, pleading for help. Stowing away on a boat, the gang heads for Dream Island to defend Chester's family of mice against Winston the White Weasel (Jon Lovitz) and his wicked weasel clan. But is their courage enough? YouTube stars Nash Grier, Jimmy Tatro, iJustine, and producer Avi Arad (SPIDER-MAN, IRON MAN) present this tale of big courage in a tiny package.