The past, the present and the future. There is a boundary between the three of them so the time lines don't crashed into each other. Nanase riku, a young idol got kidnapped on 6 December 2012. For a week, no one knows where he is till 2 weeks after. Riku found dead, drowning in the Lake. But a time distortion sudden happened, on 20 november 2012, riku got a call from the future iori on 20 December 2012. "Hear me out, nanase-san. I am here to stop the future from killing you" "Matte-" "Its almost 10.35PM, please remember. Search for the culprit or you will have the same ending as- TIIT" But There is one rule, they can only call each other on 10.33 PM a day.