The game takes place in Hisui City in the year 201X. It is July, the heart of summer, and the main character is visiting the city for a job interview. The city is suddenly hit with a major earthquake, which causes the bus they are riding on to crash and stranding them in the city. The protagonist escapes from the wrecked bus and gets their bearings, meeting several residents of the city: Ms. Higa, a schoolteacher assigned to three highschool students who were caught in the earthquake, Tomoya, who was attacked by a "scary-looking man" and whom tasks the protagonist with retrieving a box from his locker in the Hisui City underground metro, Yayoi, a young woman who, like the protagonist, was caught in the earthquake while attending a job interview, and Mr. Kirishima, the president of the struggling
IT company Vestola. After retrieving the item from Tomoya's locker, they rescue a young woman named Kanae and escape a pair of drunken thugs. Kanae suggests they travel together to Hisui's
ferry terminal, where evacuations are proceeding. As they arrive, they find the ferry is overloaded and unable to accept more passengers, but Kanae states that she must meet her boyfriend, revealed to be Tomoya, there. However, the
aftershocks of the earthquake and extreme
soil liquefaction causes the terminal to begin to collapse, so the pair flee in a lifeboat to a flooded apartment complex and rest for the night, and Kanae convinces the protagonist to help her find Tomoya. The pair awaken to the apartment building collapsing, and narrowly escape back to their raft. After making it to dry land, they go back into the city, once again crossing paths with Kirishima, learning that the source of Vestola's struggles is their rival company Kerberos taking advantage of the chaos to spread rumors about Vestola. Kanae and the protagonist eventually meet Tomoya again, who reveals he is assisting with recovery and evacuation efforts in the city, and
proposes to Kanae, who accepts. Electing to stay with Tomoya to help with recovery, Kanae wishes the protagonist luck, and the protagonist continues to search for a way out of the city. After briefly becoming inducted into, then ousted by, a
cult which had been defrauding citizens of their money in exchange for shelter, the protagonist flees into the residential district and volunteers to assist an elderly woman locate a doctor; the local hospital is overcrowded, but they manage to find medical assistance at a nearby
elementary school that had been turned into an evacuation shelter. They meet a
foreign exchange student named Danny, but the two find that most of the Hisui city citizens at the shelter distrust them, leaving them unable to find food or water; the protagonist's attempts to assist by providing tap water in a novelty water bottle causes the citizens to
believe the water to be a "miracle cure", but are angered when they discover it only to be regular drinking water, and force Danny and the protagonist out of the shelter. The protagonist arrives at a burned down shopping plaza, where they meet Tomoya again, still assisting with recovery efforts. They also cross paths with the "scary looking man" once more, who is apparently following Tomoya for an unknown purpose. After assisting the citizens at the plaza, they return to Kanae, who informs the protagonist that an evacuation plane is flying citizens out of the city at the airport, and gives them a ticket. As they go to the airport, the protagonist encounters Ms. Higa again, but they discover one of her students, Hiroko, is
attempting suicide due to repeated bullying from her classmates. Ms. Higa rescues Hiroko, but falls to her death. The protagonist continues towards the airport, meeting Yayoi again, but discovers she was
sexually assaulted and traumatized by the drunken thugs from the metro. They then discover that another, larger evacuation shelter has been established near the city center, and the protagonist may choose between going to the airport with Yayoi or journey alone to the city center. If they decide to go to the city center, they discover the area already flooded with citizens, desperate for aid. The situation is exacerbated when the Hisui
City Hall's power is restored, despite the majority of the city still being without power. The protagonist gets caught up in
a mass of citizens flooding into the city hall to demand answers from the city administration. As the crowd corners the mayor on the roof of the building, another aftershock causes the protagonist to lose balance, but they are rescued from falling by Kumazawa, an unscrupulous entrepreneur whom the protagonist had encountered in the city previously. If the protagonist travels to the airport with Yayoi, they meet Kanae at a
rest stop just before the airport bridge, and the three embark with the last group of refugees to the airport. However, upon arrival it is revealed that the evacuation plan is actually a ruse by "Snake Snake", a
human trafficking syndicate which is taking advantage of the disaster to capture refugees to sell into slavery; Tomoya, whose actual name is "Keith", reveals himself to be a high-ranking member of the syndicate, having faked his identity and relationship with Kanae to gain her trust and integrate into Hisui City's population, and has the protagonist, Kanae, Yayoi, and the rest of the refugees imprisoned in their ship. The protagonist manages to slip their bonds, and, using an
improvised bomb, frees the other refugees and destroys the ship during their escape. Keith confronts the protagonist on the docks and attempts to shoot them, but he is stopped by the "scary looking man", actually an
undercover police detective, who arrives with backup to arrest Keith and the rest of "Snake Snake." After the rescue, a helicopter arrives to evacuate the refugees, and the protagonist may either evacuate with Yayoi, or return to the city with Kanae to assist with rebuilding efforts. ==Development==