During the Mikawa Conflict, Tori and his group take advantage of an opportunity to rescue Horizon from the Testament Union, but their voyage to Floating Island England on board the ship Musashi is thwarted by Tres España gearing up for war against the British Islanders. As Tori and his crew near the culmination of their task to revive Horizon's emotions, they confront fresh obstacles in the domain of the Fairy Queen. Meanwhile, the mysterious Testament unravels, exposing the veracity behind the Armor of Deadly Sins in the electrifying second season of Horizon in the Middle of Nowhere!