Zach, Whitney, and the whole Bates family get ready to meet their newest addition, Kaci Lynn! But when Whitney has an ultrasound days before delivery, they find out that Kaci Lynn is breach and if she doesn't turn, it could have dangerous consequences for mom and baby. When the time comes Zach, Whitney, and the rest of the family are holding breaths and saying prayers for a happy and healthy new Bates.

It's time to get dirty! The family goes on a messy adventure when they pack up and go mudding on fourwheelers. Can the family's resident daredevil, Nathan, take it easy, or will he end up with his head in the mud? But when the weather takes an unexpected turn the family is in danger of losing their muddy good time. And later, Michaella and Brandon come into town to meet the Bates' newest member, Kaci Lynn!