The four girls are demoted back to basics after they make a big deal out of saving the prince in the previous season. They are not allowed on any mission, even as a suspicious figure, Carson Lazarus, a criminal mastermind, is released from jail. Soon after, a figure who calls themselves "Retro" causes all technology to malfunction and glitch in Maywood Glen.

When the girls learn about the Quail and McKeyla's super-secret plan to infilerate HAVOC, they enlist some new friends to help out with the mission.

The Quail allows the four girls to figure out this case. McKeyla becomes increasingly suspicious of Kyle, but soon dismisses the idea of him being Retro just because he knew she liked fro-yo and was wearing a black hoodie, very much like the one Retro wears. They also suspect Devon D'Marco, a troublemaker, as she spray-paints handcuffs on a picture of a drone on a poster about the upcoming launch. All four girls except Bry, who has to babysit, make ways to get detention on Saturday with Devon. Bry runs a vocal recognition as Cam and Adri confront the troublemaker and McKeyla looks through her bag. Devon is proven to be innocent, just using the school's 3D printer to make skulls for her nana's birthday.

Retro sets a trap for the girls, which causes the Quail to advise them to leave town.

McKeyla and Cam question Eli at his grandmother's house and follow him to the docks, where they learn about a diabolical plan.

When a new point of evidence involving HAVOC points to Carson Lazarus, Adrienne and Bryden comb through her trash looking for clues.

The girls band together in science and friendship. Will they be able to save the prince's space launch in time and become official NOV8 agents?

The Falcon tasks the girls with investigating a string of robberies, and EDM band EliTe returns to Maywood Glen to perform a surprise concert

Devon uses art to help Bryden and Adrienne work through their differences. McKeyla has a difficult talk with Kyle about their relationship.

The girls finally learn who's responsible for stealing the prototype. But is it too late to stop the evil mastermind's plot?

While the girls dig for more information on Bobby Stone, Adrienne and Ember make a surprising discovery about Stone Water -- and where it comes from.

New girl and teen spy McKeyla stirs up suspicions in classmates Adrienne, Bryden and Camryn, causing them to do some investigative work of their own.

The girls try to stop an intruder from stealing a prototype from Space Inc. When things go awry, McKeyla begins to doubt her sleuthing skills.

McKeyla homes in on a surprising new suspect: Camryn's dad! Meanwhile, Ember and Cam wonder if fellow camper Gordon is up to something.

The girls arrive at the Maywood Glen art opening to search for Vex, but they have no idea what the elusive mastermind looks like.

The girls act fast and use their skills to name a suspect when someone threatens to sabotage a state-of-the-art urban development.