A train sped along the tracks outside Metro City.
The train was carrying several animals from Metro City Zoo.
"This will be an exciting zoo tour," said the train's engineer.
"That's right," said the conductor.
"Lots of people will get to see the special animals from the zoo."
"People will really love Blue Baboon," said the engineer.
"He's everybody's favorite—Oh no!
Another train is coming!"
Crash!
Roxy and her friends were at Metro City Zoo.
They were standing in front of the baboon exhibit.
Roxy saw a small hill and lots of trees.
But there was no baboon.
"Blue Baboon left for the zoo tour today," said Mara.
"I miss him already!"
"Me too," said Terrell.
"I hope he comes back soon.
The zoo isn't much fun without him."
The four friends walked through the bird exhibit.
"The zoo still has lots of cool animals," said Roxy.
She pointed at a brightly colored parrot.
"I really like Parrot Pete."
"Hello," said Parrot Pete.
Roxy giggled. "Hello!"
"Cool!" said Jack. "I see vultures!"
Mara sighed. "All these birds are great.
But Blue Baboon is my favorite animal."
"Mine too," said Terrell.
Jack shrugged. "He'll be back in a few months."
Terrell's eyes suddenly lit up.
"I have a great idea!" he said.
"We can ask Rocket Girl to fly Blue Baboon home for visits!"
"That would be awesome!"
Mara pumped her fist in the air.
"Then we wouldn't have to miss Blue Baboon at all!"
Roxy rolled her eyes.
"I doubt Rocket Girl can do that, Terrell."
"Why not?" asked Terrell.
"She can fly really fast!"
"That's true," said Roxy.
"But Rocket Girl isn't a taxi service.
She has more important things to do."
Terrell nodded. "Yeah, you're probably right."
Just then Roxy's watch beeped.
She stepped away from her friends.
She made sure they weren't looking and then pressed a button on the watch.
Mayor Bloom's face appeared.
He looked shocked.
"Rocket Girl!" said the mayor.
"There's been a terrible train crash!"
"Oh no!" said Roxy.
"Where did it happen?"
"Just outside Metro City," said Mayor Bloom.
"The train carrying the zoo animals crashed into another train.
The second train was loaded with dangerous chemicals.
I think we need your help!"
Roxy gulped.
"Don't worry, Mayor. I'm on my way!"