Following Warren Buffett's visit to their school, Elena, Jones, Radley, and Lisa hear from the principal that the school trip to New York and some other school activities have been canceled. So the kids plan to raise money to get the trip to New York working again. When the kids fail to raise money for an important school field trip, Warren shows them that in business, and in life, there are no failures. He encourages them to learn from their mistakes – even embrace them. Our four heroes discard their ideas that didn’t work, focus on what did and not only raise enough money to save the field trip – but decide to form a club and help others solve their money problems. And so the beginnings of – The Secret Millionaires Club! During their trip to New York, the kids meet one of Warren Buffett's friends who happens to be Jay-Z as he encourages the kids to always follow their dreams.

While the SMC sets out to save their local newspaper by bringing it to the Internet, Jones borrows Lisa’s carefully saved money for a tournament and then can’t pay it back when he loses to a female skateboarder in the finals. Tensions escalate as both learn a high priced lesson.

Elena has to raise a piglet named Truffles for a school project and learns what she has to do to pull this off from Warren Buffett. The SMC help a friend named Pete Jr. who has been left in charge of a pet store that was run by his father who has fallen ill.

Lisa faces a potential burnout and important lesson on life-balance. The Secret Millionaire's Club come to the aid of Enzo, the owner of the restaurant Pastapolis to help increase customer awareness to his business.

Warren Buffett invites Shaquille O'Neal to help Elena make the right decision of going to an elite sports camp or jeopardizing her education.

When the Secret Millionaires Club travels to London, they learn a lesson about the illegal downloading of music when their music video is pirated by their fans. At the same time, they help to look for a solution to help their friend Millie save a record store that is owned by Millie's family while getting advice from Warren Buffett and Nick Cannon.

The Secret Millionaires Club visits Beijing where they meet Lisa's cousin Bohai who bites off more than he can chew...or sell. Together they learn that having a plan is fundamental to traveling and running a successful business.

In order to help a musical superstar and her opening act, the Secret Millionaires Club must take on a greedy manager who is exploiting the talent.

The Secret Millionaires Club goes to Scotland where Radley plans goes to MacAlistair Castle (the location of MacAlistair Bed and Breakfast owned by the Graham Family) to prove that ghosts don't exist when it is said to be haunted by the Ghost of Old Lady MacAllistair and her dog Seamus which have been scaring away customers. The Secret Millionaires Club must find a way to dispel the rumors and attract new customers. Meanwhile, Elena plans to tutor Jones in math in order to get him a good grade.

The Secret Millionaires Club goes to Indonesia to save an orangutan rehabilitation sanctuary. They discover the pitfalls of getting involved in businesses that they don't understand.

Warren, Starty and the Secret Millionaires Club are transported back into time to Camelot by Merlin where they embark on a quest to Camelot for Six Golden Rules that will save young King Arthur's kingdom (which has fallen into debt) at the same time when Guinevere is abducted by a dragon. While King Arthur is heading up a quest to learn the Six Golden Rules, King Arthur's cousin Morgan le Fay schemes to win Camelot in the auction and will try various methods to make sure that King Arthur fails.

With two of the Six Golden Rules memorized, King Arthur works to find a jousting champion to go up against Morgan le Fay's Dark and Stormy Knight. Meanwhile, Warren and Merlin search for the Merlin's former servant Knives Knasty (who Merlin fired for stealing the castle silverware) when Merlin's Book of Spells was stolen.

With four of the Six Golden Rules memorized and the jousting tournament is won by Squire Terrance Topples (who represented King Arthur in the tournament), the Secret Millionaires Club and King Arthur's group continue their quest for the remaining two parts of the Six Golden Rules while finding a way to rescue Guinevere from the dragon. Meanwhile, Warren and Merlin arrive at the auction house at Ye Bay to keep the Book of Spells from falling into Morgan le Fay's hands.

At the time when Radley imagines himself going into outer space, the Secret Millionaires Club helps to solve the financial crisis of Zack Zachary's company called Rocket Incorporated which planned to give people a tour in space. When none of the ideas to improve the company work, the Secret Millionaires Club turns to Warren Buffett and the astronauts John D. Olivas and Liu Yang for advice.

The Secret Millionaires Club visits an African village where they must bring electricity to the village as part of their challenge from Bill Gates. They meet Adisu and village elder Kwende's daughter Ateefah. The Secret Millionaires Club then plan to make a water wheel to supply electricity to the village. When Radley and Adisu end up arguing about the waterwheel designs, Elena ends up getting advice from Warren Buffett and Bill Gates on how to get them to work together.

The Secret Millionaires Club are on winter break where they find that the owner of Snowy Lodge named Jerry Crenshaw had retired and a new owner from Switzerland named Lucas has redecorated the hotel to make it feel like home. With no visitors to the lodge and no available part-time jobs due to lack of visitors, Jones gets a job to be a poster boy for the lodge's advertisement and meets Lucas' son Phillipe who secretly doesn't know how to ski.

While in Stockholm, Sweden during the Herring Festival, the Secret Millionaires Club drums up business for a small herring eatery called Dahlquist's which is run by Isak Dahlquist's family. The Secret Millionaires Club discover that Dahlquist's faces stiff competition from a fast-food restaurant called the Happy Herring which is owned by Arnie Sr. Meanwhile, Jones and Radley learns about Bandy from Isak as they learn how do Bandy against Arnie Jr.'s team.

The Secret Millionaires Club are in a race against the clock to save a local soccer team called the Swans from being sold. While improving the gameplay and the services at the arena, they receive help from one of Warren Buffett's friends named David Beeks who is a soccer player.

The Secret Millionaires Club help a robotics museum called the Robosity Museum to attract more visitors. At the same time, items mysteriously disappear where Starty is behind this due to Radley constructing a self-repair unit in him. After Starty comes in contact with the display of the robot Arty (who was built by the scientist Professor Otto von Otto), this causes a chain of events that activates all the robots in the museum who start helping Arty to repair Starty by claiming different items.

Lisa and Radley create a Fashion Bot which sparks interest from a national toy chain, but the kids focus their attention on a local store and a science fair.

The Secret Millionaires Club search for a young singer named Lucinda who hides following a great audition at a performing arts school established by Kelly Rowland. They must try to persuade her to confront her biggest fear. Meanwhile, Radley tries to help Elena ace her chemistry assignment.

An up-and-coming chocolate maker named Julian starts a new business, but he neglects to tell the Secret Millionaires Club something crucial. Now they must act quickly in order to get Julian's business on the right track and obtain money to pay for the wedding of Julian and his fiancé Zoe.