The planet has built a defense network against large meteorites that are on a collision path with it. This protective system consists of the Comet Blasters stationed on multiple orbital platforms as the first line, deploying nuclear warheads from spacecraft to neutralize incoming hazards and. The second tier employs Meteor Sweepers launched from terrestrial airbases, utilizing hypersonic jets equipped with specialized missiles to intercept debris produced by the detonations in space and on Earth's. Mikaze, a troubled youth, trains as a Meteor Sweeper pilot while aspiring to join the elite Comet Blaster squad for future glory and honor. Stratos 4 follows Mikaze and her crew's trials to earn pilot status amid Earth's looming celestial dangers that test their courage, skill, and unity.