After twenty years spent "chillin', tokin' and bonin'", Ali G is shocked to discover that his long-term girlfriend, Julie, is 8 months pregnant. Faced with an extra mouth to feed, he gets off his batty and heads to America to reclaim his former glory… but soon encounters adversaries who will ultimately threaten his and his child's very existence.

Action epic sees a passionate young man transform into a brutal warrior as he travels the unforgiving landscape in search of his long lost brother Hakan The Ferrocious, whose people are relying on him to restore order to their kingdom.