It was early morning in Metro City.
A pickup truck drove onto a construction site.
Three workers got out of the truck.
They were building a new skyscraper.
"We have a lot of work to do today," said one man.
Suddenly the workers heard something. Whirr!
"What's that sound?" asked a woman.
Whirr!
"Look!" cried the other man.
"The new skyscraper is shrinking!"
Roxy and her friends were walking to school.
They walked past Rocky Mountain Bakery.
"Mmm," said Mara. "The bakery smells good!"
"We should buy cookies after school," said Terrell.
"Good idea," said Jack.
"Look," said Mara.
"It's the Metro City Movie Theater."
Mara pointed to a very old building.
Boards covered its windows.
Cracks ran along the walls.
Weeds grew in front of it.
"It's sad that the old theater went out of business," said Jack.
"I saw lots of movies there."
"I did too," said Terrell.
"But now there's a fancy new theater downtown.
It has 12 screens!
It even has movies in 3-D!"
"I saw lots of movies in the old theater too," said Mara.
"But now my parents hope it gets knocked down."
"Why?" asked Jack.
"People want to plant a community garden on the lot," said Mara.
"They want to grow fruits and vegetables there."
"That would be cool," said Roxy.
"A garden would look much nicer than that old building."
Mara nodded. "But first workers need to knock it down."
Terrell's eyes lit up.
"They should get Rocket Girl to help!
She could knock down the old theater!"
Roxy rolled her eyes.
"I'm sure Rocket Girl has more important things to do."
Terrell frowned. "You're probably right.
But I'm sure she could do it."
Just then Roxy's watch beeped.
She looked at her friends.
"Oh," said Roxy.
"Did I bring my lunch money?"
Roxy stopped walking and pretended to look in her backpack.
She pressed a button on her watch.
"Mayor Bloom," she said quietly. "What's up?"
"Rocket Girl!" said the mayor.
"Metro City's new skyscraper is gone!"
"It's gone?" Roxy was confused.
"What happened to it?"
"It shrank and then disappeared!" said the mayor.
"Workers saw a . . . Oh no!"
"Mayor Bloom!" said Roxy. "What's wrong?"
"Help us, Rocket Girl!" Mayor Bloom's voice suddenly sounded tiny.
"Help us!"
"Mayor Bloom? Mayor Bloom?" cried Roxy.
The mayor didn't answer.
"Uh-oh," said Roxy.