Calloway wasn't exactly a devout follower of The Architect, but it was either worship, or death. Upon his 19th Birthday, he was assigned the duty of Sentinel, an honor for those who believed, and an annoying task for Calloway. The Metropolis, however, was in an uproar over just that: The Architect. On a stormy night, Calloway is forced through the stained glass, landing in Equestria. Calloway soon learns exactly how precious his duty exactly was.