Ophelia, Juliet, Jerry, and The Powerpuff Girls were relaxing in the park enjoying some banana nut muffins when they saw 4 kids playing on the swings.

One was a large boy with a light blue shirt and an aviator had, one was a Japanese girl with a green sweater, one was a blonde boy with an orange hoodie, and one was an African American girl with a red cap and dark blue shirt.

There they smelt the muffins and followed the smell. The girl with the sweater asked, "Can we please have some muffins?"

"You kids look familiar," answered Ophelia

Then a small robot containing 5 kids wearing predatory outfits came in.

"Well, well, well," they said, "Kids playing in the playground without us."

There they attacked. Ophelia puts her cloak on and puts her hood up.

"Cookie Turn!" Ophelia shouted.

Then they vaporized the cookie. Then The Powerpuff Girls tried to stop him, but they were too much. Finally, a bald boy with a red sweater and rocket boots came in. He said in a British accent, "Can't start the fun? Kids Next Door, battle stations!"

Each of them said, "5, 4, 3, 2, and 1!"

And took down The 5 children. Suddenly they fled off. "Now I know who you're," Ophelia said as she removed her hood, "You're The Kids Next Door. A group of pre-teen kids who fight for kids right. I've seen your wanted poster."

"Well miss," Numbuh 5 replied, "You got some nerves when you through that cookie. What's your name?"

"Ophelia Wavedancer." she answered.

"Even though you're a teenager," Nigel said, "You should be tested in our simulation room."

There they took off to the treehouse.

Meanwhile, the 5 children returned to a giant mansion, where they've encountered a mysterious man with yellow eyes and a pipe. "Father", they said, "We failed. We found this teenage girl with a pink cloak and a symbol with a swan and 2 footsteps."

Father said, "Unsatisfying, that girl is the warrior who's been stopping The Brigade of Gloom's monsters. I'm an accomplice of Vredtagh, he taught me everything I know."

Suddenly, he got a message from Vredtagh. "Hello Benedict," Vredtagh greeted on the screen, "How is your mission to absorbing human sadness?"

"I came up with a brilliant idea," Father answered, "You sent your monster maker to make monsters that can turn those brats into adults. Bavdrot started making the monster.

Meanwhile, at the Sector V Treehouse, The Kids Next Door was testing out Ophelia's powers. Ophelia made a Lemon Meringue pie and tossed it at the target, then missiles started to aim at her. Ophelia made a giant orange lollipop, she licked it and said, "Mmm, orange."

There she stuck the missiles together and made a chocolate bar to protect her. Then a robot came in. There Ophelia mad cream puffs and tossed it at it. There the robot malfunctioned. The kids applauded for Ophelia's powers while Ophelia removed her hood.

"So Numbuh 1," Bubbles asked, "Who were those kids who try to mess with you?"

"Those were our arch enemies, "The Delightful Children from Down the Lane." Numbuh 1 answered, "They plan to make children of the world act too polite and boring. They work for the mysterious C. E. O of Tasty Taste Ice Cream, "Father" though I don't know, but he looks like my uncle, "Benedict"

Buttercup said, "Numbuh 1, Numbuh 4 told me that you were on a secret mission, what was it about?"

Numbuh 1 said, "It was that time again, time to decommission overage operatives. Anyone over 13 can't be in."

"But Ophelia is 16, why did you let her in the treehouse?" Blossom asked.

Numbuh 1 said, "I noticed that her hair is naturally pink, we don't get those types on Earth. There we decided to test her out." Juliet said, "Y'all got a point."

Unknown to them, The Delightful Children rode The Really Really Incredibly Destructive Machine. Down to the treehouse. , "Everyone," Juliet said to the others, "I hear something."

They went outside to see The Delightful Children. Ophelia puts her hood up and they fought off. Bubbles did her sonic scream, Blossom used her laser, Buttercup used her super strength, and Ophelia used her candy powers. Unfortunately, they were unstoppable.

They summoned senior citizen like monsters and grabbed Nigel. "Like our, "Agegoroinos," The Delightful Children asked, "Bavdrot made them, they can make anyone age."

There they turned Numbuh 1 into an adult. Suddenly, The Tearsunder abducted and took off.

Numbuhs 2-5 thought they would give up, but Ophelia refused."We have to save Nigel," Ophelia said, "He's your friend!"

They decided to join her on the mission to save him. They ran off to The Coolbus. They tracked Numbuh 1 to outer space and flew off, there Ophelia, Juliet, and the others followed them to save Numbuh 1.