Ophelia, Blossom, Bubbles, and Buttercup were attending a superhero convention when Major Glory came in. He said, "Everyone, we're all here to see different supers and on how they save the day, but one hero is here to show how his science can do anything, "Dexter: Boy Genius."

A boy with red hair, glasses, a lab coat, black boots, and purple gloves come in. He displayed his latest invention, "the Neurotomic Protocore." "It is a powerful energy source. When in the right hands, it'll make anyone smart and it's eco-friendly," explained Dexter.

Suddenly, a group of owl like monsters with wolf symbols on their foreheads came in and attacked the convention. There Ophelia puts her cloak on and puts her hair in the hood.

Chocolate Ball!

There she aimed at one of them and the chocolate ball exploded. Dexter used his Dexo-Transformer and fires at them, disintegrating into dust. Then Blossom punch them, Bubbles rounded them up, Buttercup shouted laser eyes, and all the owl like monsters turned into dust. Everyone cheered for Dexter, Ophelia, Blossom, Bubbles, and Buttercup for stopping the owl-like monsters.

Outside the convention center, later on, they met Dexter's older sister, "Deedee" who had blonde hair in pigtails and a pink tutu."Gee Dexter," she said, "You've done a good job on your mission. I saw what happened."

"Deedee, should you be home with Mom and Dad?" asked Dexter

"Remember, their attending a garden party and won't be home till late," Deedee answered,

"We helped him fight off those owl monsters. " Ophelia said as she came up to Dexter, "I'm, "Ophelia Wavedancer." and these are The Powerpuff Girls."

"I love your dress." Bubbles commented to Deedee

"I love your eyes," Deedee commented as they giggled.

Unknown to them, Dexter left the Neurotomic Protocore was back at the convention center.

Later at Dexter's laboratory, he was studying a red stone with 2 castanets on it. Deedee, Ophelia, Juliet, and The Powerpuff Girls came in. Dexter was shocked and asked, "How did you get in?"

"Deedee told us where your lab is and that your password was, "Star Wars"," Ophelia answered.

Dexter gulped. Ophelia saw the stone and recognize it as the Flamenco Stone. Dexter realized that Ophelia needed it more, so he gave it to her.

"What's this grandfather clock?" Bubbles asked.

"This is a time machine," Dexter explained, "It'll take me to anywhere in the time-space continuum."

There Ophelia, The Powerpuff Girls, Deedee, and Juliet went in.

"Computer, can you take us 20 years into the future, please?" Ophelia asked.

Dexter went in at the last minute.

As they got 20 years into the future, they noticed that it was a wreck. Dexter found a light. There Juliet took Deedee, Dexter, and Juliet out of the hole and found it was polluted.

Ophelia placed on her cloak on and puts her hood up, just in case some bad guys catch her.

"It looks awful." Bubbles said in horror.

Then Juliet found a village, meaning there are people. Juliet seems to notice that their wearing rags, she held her amulet and said, "If only I can blend in."

Then her clothes changed into rags, only leaving her cloak and necklace. There they noticed that everyone was acting goofy. "This place needs some freshening up," Deedee suggested

Blossom, Dexter, and Buttercup saw some villagers making fire. There Buttercup made a fire. Unfortunately, it was destroyed by the same owl-monsters that attacked the convention. Thera trio of fighters came in. One was a man who took town some owls with his wrench, one was a female ballerina who took them out with her arabesques and steps, and the last one was also a female who shouted, "Brownie Bash!"

There she made a giant brownie and squished the owl monsters into dust. Everyone cheered for them. Ophelia congratulated them. Then the trio revealed to be future versions of Dexter, Deedee, and Ophelia.