On an Earth where neither heroes nor kaiju exist, an alien suddenly falls from the sky. Having lost his memories, he takes a human form called “Sorato” and becomes interested in “Earthlings”. When a giant life form appears, he recalls a word—“kaiju”. He transforms into “Ultraman Omega” and an intense fight unfolds. Before long, Sorato befriends an ordinary young Earthling. The story poses a question through these friends’ resonating hearts; “Why does Ultraman protect the Earth?”