Who actually knew

Who knew, who actually knew, there is a little sign to the left of the door confirming the House of Masks indeed has a service entrance, and standing at the service entrance door is a forlorn figure. Slightly chubby casually dressed in blue, carrying nothing more than a note in a pocket: no wallet, no phone. The note is the directions to the service entrance, a handwritten note containing only directions: no greetings, no invitation.

From nowhere
There is no indication as to how the chubster casually dressed in blue got here, or where...

The service entrance
Who knew, who actually knew, there was a little sign to the left of the door confirming...