WNA researchers Burton, Berecca, and Ron continue their tireless efforts to develop "Ninja-Gum"; a mysterious substance that activates latent ninja DNA in people descended from those legendary mercenaries from days gone by. Today, all their hard work finally pays off. It is here - on their 2,503rd attempt - that they finally succeed in producing Ninja-Gum. Burton and Berecca can barely contain their excitement, and waste no time in trying the gum for themselves. But then.