Sugarbelle has heard from Mrs Cake that Big Mac has cheated on her with Fluttershy, the damage this causes to her, causes her to snap, sick of being abused by life, she goes on the warpath but Mrs Cake is not as she appears. Chrysalis deciding to target the weak spot that Grogar Highlighted as returned to Ponyville to destroy the Friendship that the Mane 6 and their allies value so highly.