The movie is based on Hasbro's G.I. Joe media franchise, the movie serves as an origin story for the title character, in addition to being a reboot of the G.I. Joe movie series.
An ancient Japanese clan called the Arashikage welcomes tenacious loner Snake Eyes after he saves the life of their heir apparent. Upon arrival in Japan, the Arashikage teach him the ways of the ninja warrior while also providing him something he's been longing for: a home. However, when secrets from Snake Eyes' past are revealed, his honor and allegiance get tested -- even if that means losing the trust of those closest to him.