The continued appearance of giant unidentified life forms known as “S-Class Species (Kaiju)” has become commonplace in Japan. Conventional weapons have no effect on them. Having exhausted all other options, the Japanese Government issued the S-Class Species Suppression Protocol and formed an enforcement unit, known as the SSSP. The members chosen for the unit are: captain Kimio Tamura, strategic planner Shinji Kaminaga, unparticle physicist Akihisa Taki, and biologist Yumi Funaberi. In the midst of a Kaiju threat, a silver giant appears from beyond Earth's atmosphere. Analyst Hiroko Asami is newly appointed to the SSSP to deal with this giant and is partnered with Shinji Kaminaga. In Hiroko's report, she writes— “Ultraman (tentative name), identity unknown.”