The Thores are left heartbroken by the passing of their matriarch, Babs. With Glenn forced to navigate life without his wife, Whitney takes on the role of caring for her aging father and moves him into her home.

While the family reels from the death of Babs, their beloved matriarch, a secret, long-lost daughter from Glenn's past emerges; determined to help her dad move forward, Whitney plans a Babs-themed party with friends and family to celebrate her life.

Whitney wants to participate in her dad's bucket list, but indoor skydiving has a weight limit. Glenn prefers to have his feet on the ground as he tries to build a dollhouse for his new great-granddaughter. Whitney gets Jessica outside her comfort zone.

The Thores prepare to embark on the biggest adventure of their lives: meeting their new family; with the trip looming, Glenn worries he may not finish a surprise gift for his new great-granddaughter.