America, 19th century. Viu Bannes, a young and determined boy gets to know the legend of Gun Blaze West - a perfect place, where only the best gunmen can get. With his friend, the wanderer Marcus Homer, they began training to be able to overcome the difficulties during the planned journey to Gun Blaze West. But soon they have to face the first enemies, and the gang of robbers are just the first step during the long-long journey...

Buso Renkin is the story of teenager Kazuki Muto, who dies trying to save a girl who was being attacked by an eerie monster. The next morning, however, Kazuki is left wondering whether it was all a dream. Lo and behold, the girl, the monster, and his death are all real! The girl, Tokiko Tsumura, was actually trying to slay the homunculus (a beast that can take the form of humans, but whose main source of food is people), but Kazuki got in her way. To revive Kazuki, Tokiko replaces his heart with a "kakugane," an alchemic device that allows him to summon a lance with which to fight the monsters. It turns out that Tokiko is a member of Renkin Kenshi (Alchemist Soldiers), an organization sworn to protect the world from the diabolical creatures. Soon, Kazuki joins Tokiko in her quest to terminate the sinister being that creates and controls the homunculus.
(Source: Viz)