The security officers of the Bank of England were busy in their daily work when a letter from a mysterious letter came their way. The letter was not an ordinary one but something that made officers go weak in their knees. The mysterious sender wanted to reveal a secret about the prestigious institution. He asked the officers to meet him inside the gold vault. The very vault that was shielded with high security. How was he going to reach inside the vault? The officers decided to meet him not knowing a big surprise that was awaiting them.