The Browns hit the road for their Spring Break trip along historic Route 66 to meet up with a non-Mormon polygamist family in Missouri. Memories are made (including ones involving a 72 ounce steak), but will the close RV quarters lead to tempers flaring?

Kody, his wives, and all of the children work to compile photos and videos that bring new life and new understanding to the family. Insightful details and shocking secrets emerge to give an even deeper look into what makes this family so extraordinary.