The girls experience their city going down the drain with trash, graffiti and people doing nothing. They choose to take matters into their own hands and form a group of super-doers to protect and serve their beloved Heartlake. Doing good is hard and takes a lot of effort - but the hardest part is coming up with a super good name for their super good team doing good things in Heartlake City.

Emma wants to brighten up the city and their surroundings with her own artwork, but these gets painted over by Heartlake's own streetartist, Pranksy. In their hunt to find out where Pranksy resides, the Heartlake City heroes stumble upon an abandoned firehouse, which the girls also want to fix up and make it their own crimebusting main office - and calls it the Friendship House.

In her mission to get famous, Andrea tries to work together with her little sister, Liz, to get her to become more like herself. But Liz is nothing like Andrea, and has no interest in fame and singing. But when a mission calls Liz steps up together with the five girls to save the day. And Andrea finds out that the her and her little sister are more alike than they both thought.

"The girls are still chasing Pranksy around Heartlake City, as he is leaving his marks all over town. Mia focuses on how much she has learned from her older brother, instead of how much she misses him. The chase leads the girls to the near forest, where a fire starts - and lets the girls put their mission solving abilities to the test and try to save the day. "

While competing in a sports tournament in Heartlake City, Stephanie and the girls experiences a series of cheating events, which cause Stephanie to lose her game. But the girls get in touch with a secret group, who lurks in the shadows at each event - who are they? why do they record these cheating events? And are they with them or against them?

With the plans about tearing down the Arts District in hand, the girls and Pranksy come together and rallies a protest against Dr. Alvah and her demolishing plans. Olivia is not fully onboard, as the protest is against her idol, which also starts to question her beliefs. The protest looks like a success, but something fishy is going on among the crowd, which can turn it all on its head.

In their quest to fix up Heartlake City, they experience that the Arts District have become a ghost town, and that shops are abandoned. Which is why the girls make it their mission to help Hazel and gives her shop a makeover to save it and win over customers – but the girls experiences bumps on road, as someone are trying to stop the girls.

The international pop sensation, Jeremy Dore (aka. JD), comes to Heartlake City, and Andreas is not happy about it. According to her he is not a real artist and not a real singer - like she is. Andrea and the girls will show that Andrea too can be viral sensation on the internet.

The girls are exploring their new hobby and driving skills on the local racetrack - with renown racer Vicky Roman inspecting their very different driving styles. When they meet Vicky in person, and get a taste of her stone-cold exterior - Andrea's temper gets the girls in to a competition against Vicky, so the girls need to get training fast. Alvah is back, but the girls are ready.

The five girls keeps practicing and practicing some more - and are starting to get a hang of how to race their best. Should Vicky Roman be concerned? Especially Mia looks like she could give Vicky a run for her money. With a little help from Dottie Rae and Old George the odds are looking better and better for a victory - but will it be enough?

When Stephanie works her not so-action filled job as a lifeguard at the resort, the five girls uncovers that both sharks and a trash island are roaming the bay near the resort - getting closer and closer to the beach of Heartlake City. The girls needs to intervene and makes up the perfect plan to make the bay both shark- and trash free.

With Mias laptimes not improving as planned, and Andrea being a danger on the track, the girls need to come up with a new plan to make this happen. Mia is risking everything to win the race and is jeopardizing the entire race and her team in the process. Andrea feels left out on the team, but finds a way to help out the team - but will it too late?

The girls save the day when a giant hungry turtle comes to town.

When visiting Old Town, now controlled by AlvahBots, Andrea stumbles onto Hazels much hidden past - a past which can be a gamechanger in the girls racing, and maybe give them the edge they need to win? But the odds of the girls winning gets smaller, as Mia gets into an accident.

The girls expose how hot Alvah's new Alvahbots really are.

With a new driver behind the wheel - the girls are ready for the grand prix. Mia sees the driverless kart who ran her off the track, but this time with a driver in it? It looks like a rigged race, and can the girls win when racing against a cheating Dr. Alvah? Emma overhears some important information, but gets caught in the act.