Wild Zero

After a meteorite crashes in Asahi, Guitar Wolf, Bass Wolf, and Drum Wolf perform a high-energy concert around the strange rock. The explosive performance frames the band's rebellious mood against an otherworldly backdrop. The crowd roars as the meteorite's glow pulses in the sky.

Following the show, the band confronts their manager, the Captain, in a tense backstage room. The Captain proclaims that rock is obsolete, a declaration Ace overhears. In a violent turning point, Ace bursts in while Guitar Wolf shoots the Captain's hand, and Ace becomes a blood brother, receiving a whistle for danger.

Some time later, Masao, Hanako, and Toshi stop at a gas station on their way to see the fallen meteorite. Masao attempts a robbery, but Ace arrives on a motorcycle and interrupts. After Masao and his companions ride away, Ace meets the shy Tobio and continues on his way.

Nearby, Masao, Hanako, and Toshi stop near a lake, where Masao is killed by zombies. The undead swarm overwhelms them quickly, turning the calm stop into a deadly trap. The brutal loss foreshadows the expanding crisis.

Ace returns to the gas station and rescues Tobio from a group of zombies. They flee to an abandoned building, where they share a tender kiss. Inside, Tobio reveals she is transgender, and Ace has a vision of Guitar Wolf who tells him that love has no borders.

Zombies flood the abandoned building, forcing Ace to act. He blows the whistle Guitar Wolf gave him and signals for help as the space fills with danger. The sound draws Guitar Wolf and the rest of the band toward their location.

Guitar Wolf is blocked on the road by Hanako and Toshi, who are allowed to ride with them. They head to the gas station where Ace was last seen. Armed and wary, Yamazaki the arms dealer soon catches up with the group.

The group visits Yamazaki's weapons cache, stocking up to face the hordes. During the stop, Toshi is bitten by a zombie, worsening the group's precarious situation. Yamazaki's presence adds a cold practicality to their fight as the world burns around them.

As alien spaceships circle the globe, Guitar Wolf continues his search for Ace. Toshi becomes a zombie, and Yamazaki shoots a bitten Hanako to prevent further infection. The group's tensions rise as the extraterrestrial threat presses in.

Guitar Wolf saves Ace from a horde of zombies. Ace expresses regret for not staying with Tobio and pockets a handgun from Yamazaki before departing on a motorcycle. The Captain tracks Guitar Wolf with a zombified Toshi and launches grenades at the building, leading to a brutal showdown.

Ace finds Tobio at the gas station and the pair embrace. Their reunion is shadowed by the chaos of the undead. The zombified Toshi closes in on Hanako, who is undead, and they kiss in the chaos.

The alien mothership passes above Guitar Wolf and Yamazaki. Guitar Wolf climbs a building, unsheathes his guitar sword, and cuts through the mothership, triggering a massive explosion. The zombies are neutralized as the night sky clears.

At sunrise, Guitar Wolf gifts Ace a comb and the band rides off into the distance. Ace tells Tobio he will stay by her side, and both reaffirm their love. Ace reflects that love has no borders, nationalities, or genders.