Luna,acruiseshipchambermaid,hastoquitherjobtoattendtohersickbrother.Whiledoingso,shediscoversthathermotherhasgonemissingandherbrother'sconditionisgettingprogressivelyworse.ThesiblingsdesperatelysneakintoanemptycondounitbutsoondiscoverthatPenthouse77isnotwhatitseems.