Onpaku: Tokyo is a mere five-hour flight from Hong Kong but it is a totally different world. Sarah (Josie Ho) has come to Japan seeking to buy an investment property and to have a brief and restful holiday after a bad break-up with her boyfriend. Everything has been precisely arranged in advance; from the schedule, to the hotel, to the real estate broker and the site visits. Immediately after her arrival, things start to go terribly wrong.