Sumio Mondo is a man making a living as an assassin. He arrives on the resort island of Lospas and takes a room at the F.S.R. hotel after being tasked with detecting and defusing a time bomb, planted on a plane which is soon to leave the island's only airport.
On the way to the airport however, Sumio encounteres other hotel guests and island residents requesting his help with various problems, including searching for missing items. While Sumio is distracted by them, the airplane with the bomb on board takes off and explodes, crashing into the island.
Next morning, however, Sumio awakens in his hotel room and discovers that something strange has happened. He has not even headed to the airport yet and the airplane explosion and crash have not happened yet, either. Sumio attempts to head to the airport to prevent the explosion. Again, however, other people who need his help appear, distracting him long enough to lead to a repeat of the previous days explosion, and Sumio once again awakens in his hotel room before any of the days events have taken place. As the same fateful day repeats itself over and over, Sumio finds his hotel room becomes more and more warped and twisted, reflecting the fact that he is slowly losing his mind from the repetition. Can he solve the islanders problems and prevent the explosion before he goes totally insane?
