在这部高斯奥特曼片中,城市中出現了來歷不明的光病毒。SRC中的Eyes隊成員為要確認光源搜尋至鏑矢島，遇上了對怪獸充滿愛心的預備飛行員春野武藏。此時，光病毒入侵怪獸力特里亞斯體內，力失控，Eyes準備向力發動攻擊，武藏決要阻止，危急中，超人高斯終於回來。
One day, a sudden invasion of a virus made up of particles known as the 'Chaos Header' invades the Earth, seeking to possess the monsters to manipulate them to destroy the Earth. Musashi Haruno, a member of Team EYES once again encounters the giant, Ultraman Cosmos after ten years, reuniting as one with a strong will to see the monsters and human live in harmony. Cosmos grants Musashi a special power that will allow him to heal the corrupted monsters, with Musashi's transformation into Cosmos unknown to the rest of the team.
年轻的你，温柔的心。温柔连接着和平。
