In a futuristic society divided between the privileged "Above" and the desolate "Under," a sex worker named Youni discovers a discarded ring linked to a social welfare account. Seeing a rare opportunity to escape her bleak existence, Youni and her companion plan a risky journey to the upper layers, but the transition is marred by the brutal violence and exploitation inherent to the Under.
Julka strives for perfection as the top "doll" in a pleasure house, attempting to mentor the hostile and mysterious Sheena. While Julka focuses on client satisfaction, rumors surface that Sheena may actually be human-born rather than artificially designed. This secret makes Sheena the target of a sinister plot, culminating in a calculated security breach designed to abduct her from the facility.