Luna's guard, Rusty Shield, is rewarded with a once in a lifetime to have sex with Twilight sparkle (Not Alicorn Twilight), a magical necklace that Luna places around Twilight's neck that causes the wearer of the necklace to fall in love with whomever penetrates them. Rusty has a mischievous idea and leaves Canterlot with twilight for Ponyville, with the necklace.