Roxy glanced at her friends.
"Oh no!" she said.
"What's wrong?" asked Mara.
"I forgot a book at the library," said Roxy.
"You all go home. I'll take the next bus."
Roxy ran down the crowded sidewalk.
"Wait!" called Terrell. "We can help find the book!"
But Roxy was already gone.
"Look! It's Rocket Girl!" cried Mara.
Swoosh! Roxy zoomed across the sky.
She flew right to the car show.
The front doors of the convention center were shattered.
Bits of glass lay everywhere.
Several cars in the parking lot were smashed.
Detective Smith stood near the shattered doors.
He was talking to Mayor Bloom and some other people.
One man wore a lab coat.
Roxy landed next to the detective and grinned.
"Shopping for a new car, Detective?"
"This is no time for jokes," said the detective.
"Car theft is a serious crime."
"It isn't just any car," said the man in the lab coat.
"It's the Ultra Car!"
"Why is it called the Ultra Car?" Roxy asked.
"It's the most amazing car ever invented!" said the man.
"It's as tough as an army tank. It has lasers.
It can go under water and even fly!"
Roxy gulped. The car could do all of those things.
And now a thief had it . . . This was bad news.
"Did anyone see who stole it?" Roxy asked.
The inventor shook his head. Mayor Bloom did too.
A woman rushed over. She wore lots of diamonds.
"I know who took the car," she said.
Roxy recognized her. She was Victoria Cash, the richest woman in Metro City.
"You know who the thief is?" said Roxy. "Who is it?"
Mrs. Cash dabbed her eyes with a handkerchief.
"It wasn't a thief," she said. "It was my daughter, Ruby."
"Why would Ruby steal a car?" asked Detective Smith.
"She didn't mean to," said Mrs. Cash.
"She wanted to ride in the Ultra Car, but I told her no." She sighed.
"Ruby doesn't like to hear the word 'no.'"
"Ruby sounds a little spoiled," thought Roxy.
"I just turned my back for a moment," Mrs. Cash went on.
"Ruby must have gotten into the car.
A moment later the car took off!"
Detective Smith's phone rang.
"Smith here," the detective said. "Really? Oh no!"
He put his phone away and looked at Roxy.
"The Ultra Car is destroying downtown Metro City!"