In 2026, scientists detect a drought of catastrophic scale spreading across Africa — one not caused by any natural phenomenon. Research eventually identifies the culprit: a previously unknown bacterium that consumes vegetation at a rate never seen before, multiplying like a fungus with terrifying efficiency. Shipped goods carry it across the world. By 2032, half of all global vegetation has been devoured. A world war erupts over basic survival resources. This plague is named P-X. A renowned soldier named Spider is called in to track down the source and restore order, equipped with a specialized weapon and an AI guide.