Fred discovers that her old physics professor is the one who exiled her to Pylea, and Cordelia begins to wonder about her history with Angel.
When Fred writes an article on superstring theory that gets published in a physics journal, she is invited to her old college as a guest lecturer. Angel, Gunn and Wesley all attend her presentation, but when a portal opens up over Fred's head it looks like history may be about to repeat itself.—katierose295