Sky Bus 365.An explosion in the Eurotunnel, the main trade route between Britain and mainland Europe, severely damages both the English and French economies causing heightened tensions between both countries. In order to determine the nature of the explosion, the British Royal family calls Index as a consultant, with Tōma acting as her guardian. The flight to Britain takes a turn for the worst when Tōma learns from the flight crew, after discovering a large uncleaned blood stain, that a member of a French anti-English terrorist organization has infiltrated the flight as part of a plot to take out England's aerial supply routes. Tōma is confined to prevent panic spreading throughout the plane, whilst Index stumbles upon the main perpetrator attempting to sabotage the plane's landing stabilizers and is subsequently taken hostage as a result. Luckily, Tōma manages to hear the terrorist man-handling Index and breaks out of captivity, rescuing Index. Elsewhere, Necessarius, who are aware of the terror plot, cast a series of illusions with the hopes of forcing the plane to make an emergency landing, but their efforts are thwarted by an unidentified third party. Back on the plane Tōma subdues the terrorist but is puzzled as to why the terrorist waited this long before taking any action. Concluding that there a second terrorist that must have snuck aboard the cargo hold during the plane's brief pitstop in Paris, Tōma heads down in order to confront him. With the help of Stiyl, who arrives on a stealth jet under orders of Necessarius after their illusion casting ploy fails to land the plane, Tōma is able to neutralize the second terrorist