In this KO comedy Jimmy Connelly (Orlando Bloom) is a happy-go-lucky milkman who has the burning ambition to become the regional manager for his employers Express Milk Dairies. But Jimmy's life takes an unexpected turn when he accidentally injures Britain's contender for the upcoming boxing World title during a sparring session in his local gym, and puts him out of action. With no time to find a suitable replacement Jimmy is thrust into the boxing ring and onto the world stage as Britain's new hope for the championship, in a match of true David and Goliath proportions.