قسمت 4: رشته‌های قرمز: خلاء منطقه را می‌بلعد در حالی که بازماندگان به دنبال پناهگاه هستند

As a huge battle breaks out between the OSF operatives gathered in the area, Nagi attacks Yuito and Kasane, claiming that he doesn't know what Karen is planning but, even so, he doesn't want to betray Karen's trust. Yuito and Kasane attempt to reason with Nagi and reveal that Naomi didn't die but was rather turned into an Other, but Nagi is unconvinced by their words, forcing Seto to step in and fight Nagi. Seto is lethally injured by Nagi's blades but manages to incapacitate Nagi before dying. Suddenly, a mysterious dark void opens up in the sky and begins to consume everyone in the area, except for Yuito and Kasane, who are suddenly teleported into a mysterious realm filled with the red strings from Kasane's visions. There, they share a vision of Yuito's ancestor, Yakumo, but are unable to decipher its meaning before Kasane is enveloped by the red strings and Yuito is returned to the real world. Luka manages to save the lives of Hanabi, Tsugumi and Gemma but is unable to recover Seto's body, which is swallowed up by the void. The survivors of the battle go to a nearby shelter, where Gemma reveals that the New Himukan government plans to open up a surveillance society and monitor people with high psionic potential in the Suoh area. He also sys that the government also conducts experiments on OSF operatives, radically altering their personalities, which explains what happened to Nagi. Yuito wonders if Karen opposes the government's actions, but Gemma believes Karen must have an ulterior motive behind what happened recently. Meanwhile, Karen bears witness to an Other horde breaking into the Suoh area, while Kasane awakens right near the Kunad Highway and is found by Kyoka, Arashi and Shiden. As the OSF operatives explore the area, an unidentified man dressed in OSF gear observes Kasane. (Source: Wikipedia)

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