Mr. & Mrs. Tripp are out of town and have put the boys in charge of the house while they're gone. Nick takes the responsibility very seriously, but Toby's relishing in the freedom and his laid back approach is stressing Nick out. But when a Venture Falls corn farmer sees his field full of corn turn into popcorn on the stalk, Razzle shows up with news that a powerful, magic, Sulphur Stone has been stolen from a tribe of Earth Gormiti. Without the stone, the tribe will suffer. Lucas is chosen as Keeper and when Jessica heads to Gorm with the boys, they face off with two Earth Gormiti: Earth Shaker and Steelback. When everyone realizes they're on the same side, our heroes set out to confront Lavor and the Screaming Guardian, but the villains use the stone's power as a weapon and escape. The kids head back to Venture Falls where they discover Nick had left the water running and it's flooded the house! Mom and Dad will be home early, so the kids all work together to clean up, all the while ducking the nosey neighbour girl, Paula Pinkney. Just as they finish, a supernatural storm starts brewing in Venture Falls, Razzle returns to warn the kids that the lava Gormiti are using the Sulphur Stone to open a cosmic portal that would allow Lavor to spread his terror into other dimensions, including the Earthbound Venture Falls! Our heroes work together so that Nick can absorb the power of the stone and pull the plug on Lavor's scheme. When they return home, they learn that Paula ratted them out. The boys may be grounded, but sometimes that's the price of saving the world.

The kids at school, including Ike Pinkney, are walking through a garden for a short cut and only Lucas seems to care about the plants and birds that are being put at risk. However a mysterious fire on the water which burns down a Venture Falls warehouse at the shipping docks means trouble in Gorm. Lavion & Bombos are firebombing the Gorm forests of Destiny Valley in search of the forest Gormiti: Mimic The Fast. Long ago Mimic banished Lavion to a prison cave and now that Lavion has escaped, he wants revenge. With Jessica playing Keeper, our heroes find Mimic, but he refuses to cast the spell that imprisoned Lavion before, so Lucas does. Mimic runs away and the villains are imprisoned, all is well, right? Sure, until the kids return home where Lucas begins uncontrollably turning into his Gorm self at school! When Ike sees Lucas in Gormiti form, he freaks out thinking Lucas is Mother Nature’s revenge on the kids who have been tromping through the gardens! Nick, Toby and Jessica manage to sneak Lucas back to the primal pad where Razzle confirms that Lucas is starting to 'root' as a side effect of casting the spell. They head back to Gorm to find the essential 'essence' that Lucas lost when he cast the spell and to find it, they'll have to enter the prison cave again. Inspired by Lucas' own bravery, Mimic casts the spell to open the portal so that Nick and Toby can rescue their friend, which they do. In the end, Ike has taken it upon himself to take care of the school garden.

Ike Pinkney challenges Nick's position as the archaeology club president, calling for a new election. If Nick loses to Ike, the club will fall into ruin! But when a land-locked, Venture Falls subway floods with sea water, the election speeches will have to wait so Razzle can call the kids to Gorm. With Toby as Keeper, Nick, Jessica and Lucas find themselves confronted by a tribe of water Gormiti that have all been mesmerized into serving the evil Firespitter. The evil lava Gormiti uses his lone, hypnotic eye to turn the Lords of Nature into his slaves! Without thinking of the consequences, Toby leaps through the Gorm Gate to save his friends, which he does. Unfortunately, with no one playing Keeper back in the Primal Pad, our heroes are stuck in Gorm with a limited amount of their 'glow', when it's gone, they'll be mere kids in Gorm! Adding to their woes, if Nick is stuck in Gorm, he'll miss the election speeches and Ike will win by default! Our heroes hook up with Mantra and Delos, Count of the Sea, the only two sea tribesmen to escape Firespitter's evil eye. They explain that the villain is using their tribe to seek out a powerful wish amulet of legend that was lost on these shores. Fortunately, Nick's skills as an archaeologist allows him to find a clue in the runes of legend that Firespitter missed. Nick now knows the villain is searching the wrong shore! Our heroes set out to the proper location to find the amulet, but they're discovered by the villain and his tribe of hypnotized sea Gormiti. When the dust of the battle settles, our heroes nab the amulet and use its wish powers to free the sea Gormiti tribe and to send the kids back to Venture Falls, with just enough time for Nick to win the election!

A rogue tidal wave destroys the Venture Falls Marina. Meanwhile, Lucas and Nick watch on as both Toby and Jessica compete in a judo competition that spills out into a competition with each other. Razzle arrives with the latest news from Gorm, some strange gathering is taking place, causing the freak tidal waves. The kids travel to Gorm to find the gathering, but run into trouble with Lavor and his scouts instead. Lavor lets them go, planning to follow them to the gathering. While their orbs are charging, Toby and Jessica continue in the judo competition where Jessica beats Toby again in points, only frustrating Toby further. Back in Gorm, the kids discover a gathering of warrior Gormiti, competing with each other in an old, abandoned coliseum, where their battling is causing the problems on Earth! The kids manage to convince the Gormiti to stop, until Lord Magmion arrives with Lavor and his scout’s intent on battle. Putting aside their competitive differences, Jessica finds a weakness in Magmion's armor and Toby uses this advantage to bring Magmion down, saving the day both in Gorm and Venture Falls.

The Heralds are presented with three tests before they can obtain a special compass that will reveal to them the location of the fragments of Elestar.

Jessica and Gina have enlisted the help of Nick, Toby and Lucas in their new dog-walking business. Business is booming, but when wild animals escape from the zoo, the kids learn from Razzle that big things are going down in Gorm, rumours that The Ancient Guardians have returned to Gorm. Jessica plays Keeper as the kids check out the Gorm Forest where they discover the large, majestic creature Troncalion, the ancient Forest Guardian! The rumours were true! Troncalion is in a trap laid by Magmion! The kids manage to free the Forest Guardian, but just then Magmion arrives flying his own ancient dragon steed, Guardian of Fire, Drakkon! Magmion slaps a control collar on Troncalion and spirits him away. During the battle, both Lucas and Nick run out of glow and transform back into kids, so it's up to Lord of the Water, Toby, to track down Magmion. Meanwhile, the boys go back to Venture Falls where they assist Gina, who has become an overwhelmed dog-walking-business-of-one! But while the boys help wrangle her runaway dogs, they run into one of the zoo's escaped lions! Fortunately, one of the dogs starts barking, the others follow, which scares the lion away. Back in Gorm, Toby has tracked Magmion to the shore where he has enslaved the ancient guardian of the sea, Tentaclion. Nick and Lucas return to Gorm, but it's too late to help Tentaclion. Now if Magmion can collar the Earth Ancient, Roscalion, Magmion can channel the powers of the Ancients to open a gateway back into Venture Falls and strike at the very home of our heroes. With only enough power to destroy one collar, our heroes target the collar on Drakkon, realising that it is the evil master control collar that 'leads the pack' and enslaves the good Ancients. With Drakkon's evil control collar destroyed, Magmion's plot is foiled and the good Ancients are free once again, only now they have bonded with their new friends, the Lords of Nature!