Now that Evan's picked out an engagement ring for Carlin, there's one more big thing on his to do list, figuring out a proposal plan! He meets up with Erin and Kelly Jo to brainstorm ideas on where he should pop the question to his true love! Meanwhile, Josie and Kelton have settled on an outdoor space for their wedding. But will pending rain put a damper in planning the perfect ceremony? Last, Erin and Chad stop by Zach and Whitney's house, after learning that Whitney had a miscarriage. Together the couple's offer one another support, and help plant a tree in memory of the baby.