Your dad tells you to take the Invitation Upstairs

"Take the invitation upstairs John." Your dad tells you. "Keep it as a memento."

You do and as you go upstairs you have a proper look at it and it feels a bit weird. Normally it is made of paper or card but this is made of plastic. You turn it over and see that there is a bar code on the back. This is some sort of key card you think.

Then you remember a few weeks back that a mysterious door appeared and your dad said to keep out and that the only way in was with a certain key card.

You assume that this is it and take a detour from your room to the door which is on the other side of the mansion.

You see the red door. You walk up to it and swipe the card.