The Crystal Empire has fallen. Queen Chrysalis' quest for power had proven to be quite successful, as she managed to claim both the city as her own, as well as both of the Royals who previously resided there. With the help of Shining Armor -- the Ex-Prince turned Brood-Stallion -- the two were able to overtake Princess Cadance so she could assist them with the Queen's plans.

Now with her hunger for eggs adequately set, Cadance was more than willing to abide with her Queen's wishes to get another fill. In order to quell her insatiable cravings, she was given permission by Chrysalis to leave the Crystal Empire alongside Sunburst -- the Queen's Science Advisor and aspiring Brood-Stallion himself -- and make a secret trip to Ponyville where Twilight and her friends were waiting. The Elements of Harmony were already planning a course of action to fight their eventual Queen, and were securely protected in the Map Room by themselves as they discussed their options. Fortunately for Cadance and Sunburst, they were given a special gift from Chrysalis to help "persuade" them of her benefits. The pheromones may have not carried any smell or taste, but the invisible gas would prove to be quite effective when it's deposited in the room without their knowledge...