Once again, Musashi has encountered Cosmos. Now Cosmos has gained some new modes to defeat Scropis. Musashi has joined the SEAS team to save the Blue Area. But there is a mysterious evil monster, Sandros, who wants to destroy the Earth. Now it is up Musashi and Cosmos to defeat Sandros and find out who’s the other Ultraman?

Ultraman Cosmos 2: THE BLUE PLANET (ウルトラマンコスモス2 THE BLUE PLANET, Urutoraman Kosumosu Tsū: Za Burū Puranetto) is Cosmos's second theatrical film adaptation, and was released in Japan on August 3, 2002. It is a tokusatsu film in the Ultraman franchise, it is also a direct sequel to the original Ultraman Cosmos television series.