On a resort island sits a seaside resort unlike any other called the Flower, Sun, and Rain resort. But all is not well in paradise as Sumio Mondo, a searcher, has been urgently summoned to the island by the owner of the hotel. Upon arrival, Sumio is told that in addition to the island being stuck in a time loop and playing out the events of the same day over and over again, each day comes to an explosive end at the hands of some terrorists that have targeted the island for an unknown reason.
With the aid of Catharine, Sumios trusty computer that allows him to jack into the minds of his subjects as one of its many useful features, his job is to stop the explosive device that threatens to destroy the entire island. Using the hotel as his base of operations, Sumio travels the island questioning the residents and following up on clues in order to get to the bottom of the mystery.