This story is about three people, Sei, Nill, and Della. They work for a boss named Victoria. She gives out missions to steal objects that would be dangerous for the world. One day, they got sent into a mission to some abandoned mansion. There was a very expensive Dimond that had a code for unlocking a powerful virus. The three went inside to find it, but someone stopped them, and then suddenly, they were floating in an endless darkness.