 Luke then drinks the Master's blood, turning Luke into "the Vessel".Back at the library, Giles explains what he and Willow have discovered; that an ancient vampire, The Master, arrived in Sunnydale with his minions 60 years ago.He intended to open the Hellmouth, which is below Sunnydale - a portal between this reality and another, demonic reality - but he was swallowed by an unexpected earthquake and is now trapped in a church that is buried underground.