Thrust into the role of royal bodyguard, Lieutenant Shining Armor finds himself in the City of Roam, trying to protect Princess Cadance while avoiding accidentally starting a war with Equestria's oldest rival. His training taught him to worry about Roamish plots or over enthusiastic crowds. What he hadn't anticipated was the focus on proper etiquette, or the way his heart pounds when Cadance smiles at him, or the sheer number of creatures that want her dead. Trapped between love and duty, Cadance and Shining discover that sometimes the greatest dangers are those closest to home.