After the battle at the upside-down castle, everyone but Tsukasa is returned to a regular field in 'The World'. Did Tsukasa die? What happened to him? Captured by a previously friendly, unseen force, Tsukasa reappears with parts of his memories, thoughts and feelings 'missing'. Is this really Tsukasa or just a copy of the character's data? The other players have their own problems as well - Subaru discovers that the Silver Knight have been hiding messages from her with the latest request by the System Administrator threatening to end with disastrous results!