Pinkie Pie and Sunset Shimmer have always been best pals, but an unspoken distance has steadily grown between them...even when they share an apartment. After two and a half years of college with an age-old friend she's hardly spent time with, Pinkie Pie fears she may lose her when they both officially finish their school years. The bubbly girl has saved enough money to put herself and Sunset on a harmless road trip across the entirety of Idaho, in hopes of making up for missed time with her best friend.

When pretty much every part of it goes wrong in the wackiest ways possible for them, Sunset and Pinkie come to realize that friends don't need famous landmarks to grow as close as sisters.