"We stared deeply into each other's souls. He sat there as any rock would, except he had the look of a cold-blooded killer."

It started as a typical day for Twilight Sparkle: a cozy library and a good book to read. But her day is interrupted when she hears a knock at the door, and finds none other than Boulder sitting before her. What starts out as an odd encounter with Maude Pie's pet rock turns into a nightmare for Twilight.