To promote the film Ultraman Saga, two special DVDs have been released to lead up to the storyline of the film titled Ultraman Zero Gaiden: Killer the Beatstar (ウルトラマンゼロ外伝 キラー ザ ビートスター Urutoraman Zero Gaiden: Kirā za Bītosutā?). Shota Minami, Hiroyuki Konishi, Mitsutoshi Shundo, and Tao Tsuchiya reprise their roles from Ultra Galaxy Mega Monster Battle, Never Ending Odyssey, Mega Monster Battle: Ultra Galaxy, and Ultraman Zero: The Revenge of Belial in these DVDs. The film also features Jean Killer (ジャンキラー Jan Kirā?, voiced by Miyu Irino), who turns to good and becomes renamed Jean-nine (ジャンナイン Jan Nain?), created based on Jean-bot by the evil Beatstar (ビートスター Bītosutā?, voiced by Unshō Ishizuka), the primary antagonist.
There is a new criminal mastermind at large (Professor Moriarty) and not only is he Holmes’ intellectual equal, but his capacity for evil and lack of conscience may give him an advantage over the detective.
With his wife Elizabeth on life support after a boating accident, Hawaiian land baron, Matt King takes his daughters on a trip from Oahu to Kauai to confront the young real estate broker, who was having an affair with Elizabeth before her misfortune.
Tired of the noise and madness of New York and the crushing conventions of late Eisenhower-era America, itinerant journalist Paul Kemp travels to the pristine island of Puerto Rico to write for a local San Juan newspaper run by the downtrodden editor Lotterman.