In an alternate world where everything and everyone is made of Lego, the Equestria Girls attempt to finally enjoy a relaxing vacation on a week-long luxury cruise, without having to worry about fighting any forces of evil.

However, Rainbow Dash is convinced history is sure to repeat itself and believes that evil magic from Equestria is bound to show up. The rest of her friends are highly skeptical of that, especially when her efforts to find it only result in ruining their vacation.

Is Rainbow Dash just wasting her efforts and there's really nothing out of the ordinary going on at all? Or is there actually some sinister force that no one, not even Rainbow Dash, could have possibly expected to encounter?