Stehle's Door

Paul and Alex Zunker find out soon enough that their Civil War trophy, a packet of letters, is a curse. It seems they are a "trigger" to a dimensional doorway that ushers in a procession of hideous supernatural manifestations that threatens the Zunker family, particularly Alex.

Later, after Alex is almost killed by the intruders in her room, she and Paul determine that the letters are responsible for what is happening to them. However, when they attempt to locate the letters to destroy them,...