Escape From Secret Room

You went to your friend’s house but your friend was not in house. While waiting for him, security lock door is automatically locked. You don’t know the security key and you have to escape from there. How you will be escape? You suddenly remembered once your friend told before some time, there is one secret way of get out in that house. So you have to find that secret way and escape from there. Use some of the clues and object available there to escape from the office room which will be help you to escape from there.