MagnaCarta 2 is set in the fictional kingdom of Lanzheim, divided by an ongoing civil war between the Northern Forces, led by the usurper Shuenzeit Baron; and the Southern Forces, led by Rzephilda "Zephie" Berlinette, the Princess of Lanzheim. In response to the Northern Forces' "Sentinels"—destructive, living weapons based on the extinct Carta race—Zephie forms the Counter-Sentinel Unit in order to turn the tide. However, while trying to find the Sentinels' weakness, Zephie's bodyguard Rue is captured by the Northern Forces. Zephie goes to rescue her friend: however, as they make their escape, they are intercepted by Schuenzeit's best soldier, Elgar the Regicide. Zephie takes Elgar's killing blow to Rue and despite what should have been a mortal wound, drives Elgar away. Two years later, on Highwind Island, an ancient weapon similar to the Sentinels is discovered in the island's ancient ruins. Because of this, Juto—a young
amnesiac with a fear of swords—soon encounters Zephie and Argo, who came to investigate the weapon for the Southern Forces. Learning that Northern Forces soldiers have arrived in the ruins and remembering that his adoptive sister, Melissa, had gone there earlier, Juto volunteers to guide the Counter-Sentinel Unit members to the ruins. Upon arrival, they find that the Northern Forces have activated the weapon. When the weapon injures Melissa, Juto single-handedly destroys the weapon in a
berserker rage. ==Development==