Yui had a fight with her boyfriend and stormed out of her apartment building, rushing into the elevator—only for it to suddenly break down, trapping her inside. She's not alone; a salaryman from the same building is stuck with her, and there's no way out. With no cell phone reception, they're unable to call for help. As time passes, anxiety builds, and the two strangers, forced into close proximity, begin to touch each other instinctively. Tension mounts as their awareness shifts to each other's bodies. Though they were complete strangers, the confined space awakens unexpected emotions, eventually leading them to give in to desire and take each other.