The manga is a prequel about these four girls who would eventually make up Team RWBY upon enrolling in Beacon Academy.

The future-fantasy world of Remnant is filled with ravenous monsters, treacherous terrain, and more villains than you can shake a sniper-scythe at. Fortunately, Beacon Academy is training Huntsman and Huntresses to battle the evils of the world, and Ruby, Weiss, Blake, and Yang are ready for their first day of class.

Note: This manga is based on the independent American 3D-CGI animated series by Rooster Teeth (created by Monty Oum). The manga itself is a prequel to the original animated series, and delves into the circumstances surrounding the four main characters.