A typical Japanese schoolgirl becomes a full-fledged zombie fighter when she travels to the countryside for a visit with her grandfather, and discovers his village has been overrun with the living dead. Rika almost made it to her grandfather's house in one piece, but a run in with some particularly hungry flesh-eaters left her half the girl she used to be. Fortunately for Rika, Grandpa Ryuhei is a talented surgeon. In the process of patching his granddaughter up, Ryuhei goes one step further and turns Rika into the ultimate zombie fighting machine. But Rika's ordeal isn't over just yet, because Zombie Boss Glorian is still out there and thirsting for vengeance. Perhaps with a little help from her friends Takashi and Yuji Rika will finally lay waste to the lowest of the low, and somehow find the time to keep up her good grades.