Organization (WRO), an organization dedicated to helping the planet recover from the events of Final Fantasy VII, fights the soldiers and forces them to retreat, but not before many of the citizens of the town have been captured, and many more killed. Reeve explains to Vincent that the soldiers were members of Deepground, a military organization created as part of a covert Shinra operation to create genetically enhanced super soldiers. Vincent soon learns that he is one of Deepground's primary targets, as he is unknowingly in possession of "Protomateria", a substance which he uses to control the "Chaos" gene hidden inside him. Deepground claims they need the Protomateria to control "Omega". According to ancient tablets discovered some years previously, Chaos and Omega have an unknown but important relationship, with Chaos described as "Omega's squire to the lofty heavens." The Chaos gene was injected into Vincent over thirty years previously by the scientist Lucrecia Crescent, Hojo's research assistant, with whom Vincent was in love. In an effort to find answers, Vincent goes to the town of Nibelheim where Lucrecia studied Omega and Chaos. Whilst at Lucrecia's research lab, Vincent is ambushed by Rosso the Crimson, who steals the Protomateria but is prevented from killing Vincent by the arrival of Yuffie. As they return to the WRO headquarters, they find that Deepground has launched an assault on the base. However, Deepground member Shelke the Transparent has been captured by the WRO, and reveals that she is synaptically interconnected to Lucrecia's memories, thus allowing the WRO to complete Lucrecia's research on Omega. Shelke's sister, Shalua Rui, a high-ranking scientist in the WRO, soon discovers that Omega is a WEAPON, which activates when the Planet senses that it is in mortal danger (like the WEAPONs it activated in the original Final Fantasy VII). Omega's function is to absorb the Lifestream from the Planet and then move to another planet, leaving the inhabitants behind to die. Deepground plans to slaughter a huge number of people at once so as to 'trick' the planet into activating Omega prematurely. Vincent and the WRO launch a full-scale assault on Deepground's headquarters in Midgar. While Reeve's team battles the Deepground soldiers and attempt to destroy the Mako reactors which serve as a means to revive Omega, Vincent heads to Deepground's centre of operations to confront Weiss. He is surprised to find Weiss slumped in his chair, dead. However, as