What is the plot of "The Open Window"?

Frampton
Nuttel suffers from a nervous condition and has come to spend some time alone. His sister sets
up introductions for him with a few members of the community. His first visit is to the
Sappleton house where he meets fifteen-year-old Vera, the niece of Mrs. Sappleton. Vera keeps
Nuttel company while he waits. Upon hearing that Nuttel has not met the Sappletons, Vera tells
Nuttel some information about the family. Vera says that three years ago to the date, Mrs.
Sappletons husband and two younger brothers went on a hunting trip and never returned. Vera goes
into detail about the clothes they were wearing, the dog that accompanied them, and the song
that Mrs. Sappletons brother sang upon their return. Vera says that her grief-stricken aunt
watches out the window expecting their return. When Mrs. Sappleton enters, she tells Nuttel that
she expects her husband and brothers to return at any moment. Nuttel listens, thinking that Mrs.
Sappleton has in fact gone crazy. Suddenly, Mrs. Sappleton brightens as she tells Nuttel that
they have returned. Nuttel turns only to see the "dead" hunters. He becomes frightened
and leaves in a rush. Mrs. Sappleton doesnt understand Nuttels strange behavior, but Vera
replies that he is deathly afraid of dogs.

Not until the end of the story
does the reader realize that Vera has tricked Mr. Nuttel. This is revealed with the last line of
the story: Romance at short notice was her [Veras] specialty.