Yet the spirit of Nat (Davika Hoorne), who also died from respiratory disease, is neither seeking revenge nor wishing to cause trouble. Missed to distraction by her husband, March (Witsarut Himmarat), Nat returns in the form of an especially slinky vacuum cleaner (created by the award-winning industrial designer Sim Hao Jie), the pulsing lights in its handle attuned to Nat’s changing emotions. And to the horror of March’s widowed mother, Suman (Apasiri Nitibhon) — already distracted by an infestation of malevolent ghosts in the factory she inherited from her husband — neither the police nor a Buddhist ritual nor a gaggle of disapproving relatives can dissuade the reunited couple from resuming marital relations.