After the obsessive Trixie defeats Twilight Sparkle, and is in turn beaten at her own game, Twilight finds she can't stop thinking about her. Her emotions towards the showmare are a mess: pity, disdain, bemusement, a hint of admiration, even -- attraction. In innocence, she sends Trixie a letter. The showmare comes, sparking a relationship that looks like it's the best thing that's ever happened to either of them. Soon however, it's not enough for Twilight. What happens to the Great and Powerful Trixie when she becomes the Greater and More Powerful Twilight's obsession?