It's a Saturday afternoon, with nothing to do. Rarity has a trip to Las Pegasus she's been planning for months, but she doesn't want to go alone. Rainbow Dash is looking to go on a road trip of debauchery with a friend, but she doesn't know where, and almost none of her friends are available. Almost. Now with the trip ready to launch, Rainbow and Rarity prepare for a weekend of bright lights, roulette tables, and winning the legendary Holy Jackpot. Except now, they also have to pay off a peeved mechanic they accidentally stick with a hefty fine. Will the deranged, dastardly duo come out of Las Pegasus as prosperous ponies, or will their other friends end up having to take a road trip themselves just to bail the two out of a Las Pegasus prison?

When the Mane 6 fail horribly at throwing Princess Celestias' birthday party, they get at each others' throats. When they get at each others' throats, Princess Celestia gets very upset at them, and when the Mane 6 upset Princess Celestia, they find themselves role-playing as each other for a day as punishment for such collective disharmony. Will they all gain the epiphany Princess Celestia hopes they'll get, or will Ponyvilles' collective eyebrows rise so high that they'll cause irreversable damage to everyponys' faces?