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Five years after the events of Borderlands, a valuable mineral called "Eridium" starts flourishing through Pandora's crust. Handsome Jack, the leader of the Hyperion Corporation, secures this new resource and uses it to rule over Pandora with an iron fist. Meanwhile, rumors of an even larger Vault hidden on Pandora spread across the galaxy, drawing a new group of Vault Hunters to the planet in search of it.