Sawa, the killer from the previous "Kite" series, vanished without a trace after avenging her parents' demise. Years later, an ethereal figure emerges in the shadows of a bustling metropolis, elegantly murdering her prey before vanishing into the night. Monaka appears to be a typical high school student, leading a reserved and unassuming existence. However, there is a darker side to her persona - she transforms into an angel of death.