Marcia breaks a date with Charlie when "big man on campus" Doug Simpson asks her out. However, after she gets hit in the nose with a football, Doug Simpson breaks his date with her.
The Bradys go on vacation to Hawaii. While there, Peter and Bobby stumble upon an ancient Tiki idol that some locals believe brings bad luck to the person who is touching it.
Marcia says she can get Davy Jones to sing at her school's junior prom because of a letter Jones sent her as president of the local fan club. The problem is that she can't get to him to ask, and the school has already made the announcement.
The boys try to spook the girls in the middle of the night with a ghost, so they try to get revenge by giving them a taste of their own medicine. But after Alice criticizes them for being so scared, the kids collectively have a new target.
After bad luck continues to befall the family, the Brady boys set out to learn about the ancient tiki. They learn the tiki is tabu and must be discarded at an ancient burial ground.
The kids want to buy Mike and Carol an engraved silver tray as their anniversary gift, but Jan goofs up on paying for the tray. To fix the mistake, Jan convinces her siblings to audition for an amateur talent show.
The Brady boys arrive at the cave to return the idol to the burial site, only to be held prisoners by an angry archaeologist who lays claim to the cave and believes that they stole the idol.
Jan is tired of being compared to Marcia and constantly being told how great her older sister is, so she tries to do something that Marcia never accomplished--make the pom-pom team.
Jan needs glasses but doesn't want to wear them because of how they make her look--until she has an accident that destroys Mike's surprise anniversary gift to Carol, a framed portrait of the Brady kids.
A talent agent signs Greg to become a rock star named "Johnny Bravo." Greg lets his new fame get to his head, until he discovers that he was only signed because he "fit the suit."