Clinical trials for a vaccine are underway in Fukuoka when Akira and his team receive an SOS from Okinawa. A massive horde of zombies is invading the Okinawa base, and they need backup before the last stronghold on the island is overrun. But with no way to get to the tropical island, the gang feels hopeless—that is, until a blast from the past descends from the skies. It’s time to skydive to save Okinawa!