A man decides God needs to wake up, so he starts collecting his own son's blood. The city burns while three kids run from impossible odds, hunted by things that used to be human. Beast Fighter doesn't build tension, it is tension, thirteen episodes of escalating desperation where every escape just reveals how much worse it's about to get.
A city lies in ruins, obliterated by two godlike creatures. Genzou Kuruma, a brilliant scientist leading a fanatical cult, believes he can resurrect God through a ritual requiring a specific bloodline. His own son, Shinichi, carries that blood, along with Ayaka, a girl with the same rare trait. What should be a family bond becomes a hunt. Shinichi refuses to become his father's tool. Armed with the same power flowing through the cult's genetically engineered soldiers, he can summon monstrous beasts from within his own body. As Shinichi flees with Ayaka and their unlikely ally Tommy, he transforms this pursuit into his own war. Every confrontation with his father's altered humans pushes him closer to a single goal: personal vengeance. The apocalypse is already underway. Shinichi fights not to save humanity but to stop the man responsible for everything falling apart. Raw, visceral combat meets a family tragedy spiraling toward an inevitable reckoning, where the line between monster and human blurs with every transformation.