When they realize their ideas collide, they use the money to try to reunite the entire family for Christmas by paying for airline tickets for their children, grandchildren and their in-laws.

However, all of the Brady kids are facing personal obstacles that might keep them from enjoying the festivities: Greg's wife Nora is spending Christmas with her family; Peter is romantically involved with his boss Valerie and his inferior position and salary is affecting his self-confidence; Bobby has dropped out of graduate school to become a race car driver but has not revealed this to his parents; Marcia's husband Wally was fired from his job at a toy company; Jan is separating from her husband Phillip and Cindy is fighting for her independence since she is the youngest and still gets treated like the baby of the family.

Jan got back together with Phillip, Bobby told his family about that NASCAR racing circuit, and Wally got a new job at Mike's friend's toy company.

After she takes Sam back, the family invites him to stay for dinner, and everyone ends the film singing a chorus of "We Wish You a Merry Christmas".

[8] The film was re-released on DVD by CBS/Paramount in June 2019 as a part of The Brady-est Brady Bunch TV & Movie Collection to commemorate the 50th anniversary of the original series.