Someonedownloadsanapponyourphonebehindyourback.Itlookslikeanaugmentedrealitygame,butsoonyourealizeit'sanappthatconnectstotheworldofthedead,whichallowsyoutoseethedeadthroughthecameraofthephone.Onthescreenyouseeacountdowntimerstartingfrom24hoursandbeforeitreacheszero,youhavetodownloadtheapptosomeoneelse'sphone...