Let's boogie, let's dance! Some bad cats are out and about causing trouble in San Marecisco and the two grooviest ponies on the block are on the case! Due to a mix-up with the party planning committee Pinkie Pie and Rarity are stuck in Bay City. Someone's flooding the streets with counterfeit confetti and the local party scene is in complete chaos. Before the odd pair of ponies know what hit them, they're thrust in the middle of a funky tornado of crooked party favor suppliers, glittering dance floors, a gang of jive-talking pussycats, and a pile of bogus confetti.