In Jack Beechwhistle: Attack of the Giant Slugs, Jack Beechwhistle carries a secret life as an undercover agent tasked with protecting the world from alien attacks, zombie sweet-shop owners, exploding conkers — and now, giant slugs. When these slugs invade his school in the middle of math class, Jack must help his friends Colin and Harry (so long as it's not past their bedtime!) deploy daring plans from their top-secret headquarters (the shed by the rhubarb patch).