Richie Rich has moved his dad, Cliff, and his sister, Harper, into his newly built mansion; Richie promises to go and see a concert with his best friends on the same night he promised to be at family game night.

Richie is assigned to do a school report on a foreign country; Harper is stressed about prepping for her big interview with a Harvard admissions officer; Tulip accidentally loses all of Harper's clothes.

Richie and Harper team up to set up their dad, Cliff, on a date; now that Richie is a public figure whose wealth is well known, Darcy and Murray decide they should be trained as his security detail.

After Richie struggles to write a book report on "The Wizard of Oz," his neighbor convinces Richie to make a major motion picture as his report; Harper is afraid of not getting her first "A" ever, so she enlists Tulip's help.

Harper is left in charge of Richie when Cliff must leave home for the night; Murray attempts to tutor Tulip in math so she will not get kicked off her sports team.

Richie deals with a money-related dispute between Darcy and Murray; Harper is getting ready to introduce her new boyfriend, Camden, to her dad.

Richie travels to Antarctica with Darcy and Irona to discover a new frozen life form and come back with what they think is an amazing discovery but it turns out to be a frozen Murray; Tulip cancels on Harper for girls' weekend.

Richie decides to volunteer at a school, but ultimately does more harm than good; Murray adopts Cliff as his big brother and tries to teach him how to be a responsible grownup.

Richie is convinced his room is haunted and enlists the help of Darcy, Murray, and Irona to try and get rid of the "spirits"; when Harper discovers there are no home movies of herself she decides to create her own.

When Irona is malfunctioning, Richie is sent a replacement model and Richie instantly develops his first crush; Cliff tells Harper a white lie that shocks her and makes her rethink how she spends her time.