One day, after a battle with Ben, Vilgax disappears, leaving behind the words, "I will make you experience the worst horror from what you consider the most insignificant". Afterward, insects such as cockroaches and grasshoppers suddenly begin attacking humans in swarms. To solve this problem, Ben and his companions shrink using Gwen's magic and sneak into the insect world...! Will the superhero Ben be able to save Earth and humanity from the danger posed by the insect invasion?!

After enjoying his time as a superhero, Ben goes camping by the seaside with Gwen and Grandpa Max for the first time in a while and has a great time. Suddenly, a terrifying monster emerges from the ocean and harms the people, but Ben transforms into a superhero and defeats the monster. Just as Ben defeats the monster, a boy named Triton appears from somewhere and asks Ben and his companions for help, stating that the Underwater Kingdom is in danger. Who is Triton, and where is this Underwater Kingdom in peril? Will Ben be able to save the massive Underwater Kingdom from this crisis?!

Science Hero Ben 10, this time embarking on an adventure underwater!

While actively working as superheroes, Ben and his companions meet Triton, a boy from the underwater kingdom of Atlantis, and set off to save Atlantis from danger. Ben, Gwen, and Max arrive at the underwater kingdom marveling at the beauty of the ocean they are seeing for the first time, but Atlantis is in great crisis due to the plot of Dr. Animo. Ben transforms into a superhero and fends off Animo's attack, but at that moment, Animo kidnaps Gwen and Grandpa Max to Antarctica...! Will Ben be able to stop both Vilgax, who is after the Omnitrix, and Animo, who is plunging Antarctica into crisis?

One day, Ben learns that Richard, a friend of his grandfather Max, was kidnapped by someone after discovering the city of gold, El Dorado, in the Amazon. Setting off into the Amazon jungle to rescue him, Ben and his companions overcome various dangers to reach the mouth of the Amazon River. However, the captain of the boat they board to cross the river suddenly plunges them into a river teeming with piranhas...! Will Ben be able to defeat the villains and rescue Richard?!

Arriving in the Amazon jungle to search for Grandpa Max's friend Richard, Ben and his companions become trapped in a wildfire started by the evil poacher Colonel Kilgore. However, thanks to a torrential tropical downpour, they narrowly escape the crisis, and Ben transforms into Ghostfreak to sneak onto Kilgore's gang's helicopter to save the sloth Lupai... Will Ben be able to defeat the villainous poachers and save the Amazon's endangered animals?!

One day, Ben and his companions, including Gwen, visit the headquarters of the Plumbers organization after receiving an invitation. There, they hear from Terra, a Galactic Patrol agent, that Doctor Doom, the galaxy's greatest villain and planet destroyer, is heading toward Earth. Chasing Doctor Doom's spaceship deep into the Pacific Ocean, Ben transforms into Heatblast and approaches the center of Earth, which is said to be hotter than lava. However, Doctor Doom has already planted bombs on Earth and fled into space to detonate another planet... Will Ben be able to catch Doctor Doom and prevent Earth from exploding?!

When Doctor Doom, the galaxy's greatest villain and planet destroyer, plants a time bomb on Earth and flees, Ben and his companions set off into space to capture him. Having taken notice of the Omnitrix, Doctor Doom creates a second version, Omega Doom, to attack Ben and his group. Catching Doctor Doom, who swiftly scurries from planet to planet at critical moments, proves to be incredibly difficult... Now, there are only 100 hours left until the explosion! In this desperate crisis, will Ben be able to stop the Earth from exploding?!

One day, when Doctor Doom, the galaxy's worst planet destroyer, plants a time bomb on Earth and flees, Ben and his companions set off into space to capture him. While chasing the swiftly fleeing Doctor Doom, Ben is captured by the Polar Space Pirates and faces the risk of being handed over to Vilgax, but he manages to narrowly escape the pirate ship. However, the spaceship Ben and his companions are supposed to escape in is shattered into pieces by an enraged Vilgax... There are now only four hours until the Earth explodes! Will Ben be able to change the fate of the Earth's destruction?!

Kevin, who stole the weather generator created by Dr. Toto, the galaxy's greatest scientist, to solve Earth's climate anomalies, manipulates the weather at will to torment Ben. Witnessing this, the unscrupulous CEO Palmer kidnaps Kevin, steals the weather generator, and plots to profit from the weather. Meanwhile, due to the reckless manipulation by multiple people, the weather generator malfunctions, triggering a super hurricane that threatens to engulf the entire globe... With cities on the brink of complete destruction, will Ben be able to stop the hurricane?!

One month after the scientist Animo—believed to be trapped in the Antarctic ice—steals Ben's blood, a strange incident occurs to Ben and his companions. Life forms created using Ben's DNA have appeared. Ben and his group track down Animo's lair, but countless hordes of Benwolves suddenly appear from somewhere and attack them. Ben manages to subdue the horde of Benwolves all at once with a clever strategy, but the real trouble is just beginning. What exactly is Animo plotting with Ben's genes? Cloned monsters born from cutting-edge biotechnology... Our future depends on the superhero Ben.

Ben and his friends venture deep into the mountains to enjoy a camping trip for the first time in a while, where they discover a mysterious creature resembling a mole. Following the cute Remo, who introduces himself as a friend from the underground world, Ben and his companions venture into the depths where an amazing adventure awaits. While exploring this mysterious underground realm, they discover that the once-clear groundwater has recently become contaminated and unexplained earthquakes have occurred, putting the underground world in danger… The culprit behind this crisis is none other than the CEO of a wicked corporation secretly dumping poison into the forest! Will Ben be able to protect the land and the forest and save his friends? An exciting showdown between Ben and the villains unfolds alongside an adventure in the mysterious underground world where various life forms coexist!