It’s Dan and Louise’s wedding day, but it’s a far-from-perfect walk down the aisle, especially when a weather report forecasts that a tornado is headed for Lanford creating chaos and surprises.

The Conner home is decked out for Halloween, despite the leak in the roof that forces Dan and Louise to cancel their honeymoon. Becky surprises the newlyweds and takes them on a virtual adventure around the world. Meanwhile, Darlene continues her spiritual journey, and Harris introduces Aldo’s children to the family.

When Jackie devises an offbeat plan of how to serve the customers at The Lunch Box, it's anything but smooth service; Dan begins to sell some furniture to make room for his new bride and her things.

Darlene continues to navigate her breakup with Ben, and when she and Becky head to the movies and see Ben on a date, Darlene can’t stop herself from interfering and making everyone uncomfortable. Meanwhile, Dan offers to talk with Aldo’s dad, Jesse, when he doesn’t approve of Harris and Aldo’s relationship

Ben and Darlene are excited to share their good news with the family; but before they have the chance, Neville and Jackie, and Aldo and Harris share some very similar news of their own. Looks like there are three parties to plan!

The Conners gear up for a megawedding! Jackie and Neville, Darlene and Ben, and Harris and Aldo are planning for a shared big day, but along the way they discover that some of the couples may not be on the same page about their happily ever afters. Meanwhile, Dan and the family have decked out the house for the occasion, but will all six of the lovebirds make it to "I do"?