Wataru, a freelance cameraman who works for a travel magazine in Tokyo. He had aimed to be a teacher but failed to achieve his goal and left home to go to Tokyo. However, he does not do well in Tokyo and has to return to his hometown. Wataru reunites with his former girlfriend who is a primary school teacher now and through his interaction with his family, friends and a group of primary school students who want to take part in a choir contest, he begins to take steps to resurrect his dream of being a teacher.

The mysterious Ultraman, Tregear, has suddenly appeared in Ayaka City. Tregear asks what one would do to make their dreams come true, prompting Katsumi to search for his own dream. As a monster appears for the first time in a year, Ultraman Blu and Ultraman Rosso are joined by Ultraman Geed to face off against this new threat. Walking towards their dream with the heart of the Minato family in hand, Ultraman Gruebe is born.