The members of the Black Cats tribe are subject to a terrible destiny of being hunted, enslaved, and killed. Twelve-year-old Fran, a member of this persecuted race, longs for revenge for the atrocities committed against her people. She dreams of a brighter future, one for which she will not hesitate to take bold action. When she encounters a talking sword, a reincarnated man in search of a wielder, her fate is forever changed.
Together with her new ally, Fran is determined to restore the pride and dignity of her people by cutting down all those who stand in her way. She sets out on a journey with her remarkable sword, brimming with an unwavering determination to succeed.