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-Annie invites Professor Cornwallis to Jeff's Christmas party, in the hopes of improving the grade on their history class group project.
-Under the mistaken impression that they have received a failing grade on the project, chaos ensues, fingers are pointed, and Chang ties up Cornwallis.
-After Cornwallis tries to tempt each member of the gang into betraying the group, it is eventually revealed that Cornwallis was never tied up at all, and simply didn't want to spend Christmas alone.