1. First try to get the tail backup of the log if available with No Truncate option. 2. Restore the Latest full back up( 8:00 AM) WITH NO RECOVERY 3. Restore the latest differential backup( 11:00 AM) WITH NO RECOVERY 4. Restore all the Transactional backups taken after the latest differential backup. In this scenario restore the Transactional log backup taken @ 11:15 AM WITH NO RECOVERY 5. Restore the Tail backup WITH RECOVERY