It's too late!

No sooner had you stepped out the door do you snap to your senses. You quick spin around and dive for the door before it shuts...

... click!

"Shit..." you exclaim in frustration, turning the handle vigorously to no avail. It was locked and you'd carelessly managed to wander outside without both your wallet and your keys.

You spend at least a two minutes banging on the door, calling out Jenny, before your brain once again corrects itself. Jenny wasn't in; the house was empty.

With no mobile either, you don't have many choices. You could try one of your three other neighbours on this floor, or you could go downstairs and see if the building's superintendent was around.