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Daigo remembers that he had left his father's letter and all of his stuff behind on Gabutyra's island, while the Debo Monster Debo Yakigonte causes the other Kyoryugers to fight each other.

冰結城指揮官卡奧斯派出怪物，以造假手法攻擊獸電戰隊，趁戰隊陣腳大亂時另作圖謀。天生傻氣的醍醐以一夥忠直的心破解敵人陰招，並帶領戰隊強勢取勝。卡奧斯在荒島搶奪了被封印的最強獸電龍翼轟龍、獸電戰隊的賢神多連暗暗心驚，知道這場仗越來越難打。