ある日突然、空から正体不明のロボットが落ちてきた！それに続くように次々とやってくる来訪者達。変な鳥を肩に乗っけた宇宙人、GUTS-SELECTとは違う謎の防衛隊員。そして……別のウルトラマン！！トリガーとGUTS-SELECTの新たな戦いが始まる！？
Suddenly, a unidentified robot falls straight out of the sky! Following this strange happening, visitors begin appear one after another: An alien with a strange bird on his shoulder. Members of a mysterious defense force different from GUTS-Select. And finally... another Ultraman!? Is this the beginning of a new battle for Trigger and GUTS-Select!?
