Mostyn, Morsemere and Montague: Three siblings hailing from the Hollow Shades are in their first real week of work stationed for the protection of Canterlot Castle. Their talents make them a good fit for the position, even when pushing their superiors' patience to the limits.

This night, however, is unlike any other night. There's an intruder along the castle wall, and the trio are forced to deal with the situation. Little do they know, it's a scenario they were completely untrained to handle, and things swiftly take a turn for the lewd...