Bond is sent on a mission to retrieve a hard disk containing secret agent identities. The mission goes wrong and MI6 is attacked, killing agents and compromising M. Bond comes out of retirement to hunt down the mysterious hacker, Raoul Silva, who wants revenge on M. Silva leads Bond on a global chase from Istanbul to London. At Skyfall, Bond's childhood home, he works to protect M from Silva and prove his loyalty in the face of threats to British intelligence.