[Plot: Switch]
[The mailboxes disappear at midnight, but their departure has an unexpected effect. The Door Worlds and the mundane world of Las Vegas inverse without warning, two massive forces moving to collide and just missing one another in a perfect reversal of space. Alters are forced out into the hallway of Passages where the dry desert air gives unpleasant welcome, while the former inhabitants of Las Vegas find themselves neatly fitted into their Alters' former roles and worlds. The new inhabitants of fictional worlds seem to belong as if they have always been there, with only their own memories to remind them of what they have just gained--or lost. Those who are sent to Las Vegas find themselves very human and very ordinary, in a world that has never known them at all, and all are left to adjust without explanation or reassurance.]