In a specific cafe and chair in Japan, one can travel back in time while drinking a cup of coffee. There are, however, 5 rules/restrictions. It opens for closure and changing one's future but not present.
It is Xmas, the time for shopping, consumerism, gifts, late gifts and of course silly hats. This is no time for a call into a television station with an ultimatum about a bomb in a major population centre like Tokyo. In fact, a video is uploaded demanding a conversation with the Prime Minister or else.. a bomb will blow up. Can the police stop the criminal and avoid deaths?