Mars has been colonized, and in this world children are replaced by robot servants called “dolls.” Layla, a skilled fighter burdened by a tragic past, travels the planet with her companions: Nei, a peculiar doll whose connection to Layla remains mysterious, and Speedy, a doll breeder. The founders of Mars view the trio as a threat, and with each assault on Layla and Nei, more fragments of their enigmatic past and future are uncovered.