The narrative centers on Hyuma Hoshi, a talented young baseball pitcher aspiring to become a top star in the professional Japanese league, just like his father, Ittetsu Hoshi. His father had previously played as a third baseman but was compelled to retire after sustaining an injury during World War II. Hyuma joins the highly popular Giants team, where he quickly comes to understand the burden of high expectations. From the exhausting training regimen to competing against rival Mitsuru Hanagata of the Hanshin Tigers, he must employ his finest pitching skills to rise to the occasion.