Everyone who has completed high school remembers their senior year. So it is for Catelyn and Mary Margaret. Mostly, they remember how fast it went, how before they knew it was March and they were going on their senior trip, wondering about who would ask whom to the Senior Prom. They also remember, however, a very different senior year—one so different that they can hardly believe that they are both the same year. They remember a year full of fear, remembering the Harbinger who came into their dorm room, and how they were waiting for the next shoe to drop. The new-and-improved Sanctuary spell, made even stronger after the Harbinger incident, seemed to succeed in repelling any minions the First Evil might have sent against the few Potentials the school harbored, but they all knew that they were only postponing the inevitable.

Since Mary Margaret was now aware of her potential calling, Fr. Marcus upped her training from the standard self-defense all St. Clare's students received as part of their physical education courses to a more intensive regime designed to prepare a future Slayer. Catelyn, on the other hand, turned her attention to the school library, searching St. Clare's archives for references to the First Evil. She found some allusive references in the Petrachan Codex, and had Sr. Sinclair (St. Clare's Latin teacher) tutor her in some of the demonic languages she needed to read to learn further.

But both Catelyn and Fr. Marcus remembered that the First Evil was not the only enemy St. Clare's students would have to fear. For there was another, one who had also made an attack upon the school at the beginning of the school year…an excommunicated Catholic order named Inquisitore.