When a criminal mastermind exposes the identities of all undercover agents in Britain, the secret service is left with no one to turn to except Johnny English. Now working as a teacher at a small prep school, Johnny is called back into action to track down the mysterious hacker behind the breach. Armed with outdated techniques and an unshakable confidence, Johnny must take on a high-tech villain, proving that even the most unconventional methods can still get the job done.