"What's a show shirt?" Cole asked.
"It's a special kind of shirt that you wear under your show coat," Daisy said with a frown.
"Mine was hanging by my pony's stall earlier.
But when I went back there just now to get changed, it was gone!"
"Is your show coat missing too?" Henry asked.
"No, it's just her shirt," Maggie said. "Don't worry, Daisy," she went on.
"The Lemonade Detectives are on the case!"
"Thanks." Daisy still looked worried.
"I really hope you can solve the mystery before my first class.
I'll never win a blue ribbon if I'm wearing this!" She pointed to her T-shirt.
"Ms. Wood said fancy clothes aren't mandatory," Maggie reminded her.
"You just told me that."
"I know," Daisy said. But she still looked worried.
"What does your shirt look like?" Henry asked.
"It's mostly white, with long sleeves and a high collar," Daisy said.
"There's a pocket in the front with a strip of pink and yellow polka-dotted ribbon across the top."
Henry looked around.
A lot of the other riders were wearing long-sleeved white shirts with high collars.
But none of them had pockets like that.
"It sounds like your shirt will be easy to spot," he told Daisy.
"We'll see what we can do."
"Thanks." Daisy sounded distracted.
"I'd better go see if anyone has an extra shirt I can borrow, just in case."
"Are you guys crazy?" Cole said after Daisy left.
"We don't have time to solve a mystery today.
We're supposed to be selling lemonade!"
"We can do both." Maggie sounded excited.
"If we solve the case quickly, maybe I can use the detective fee to enter more classes!"
Cole frowned but didn't say anything else.
Henry wondered if he was thinking about swim team practice.
Cole loved being on the swim team, and he hated to miss a practice.
If they finished early at the show, Cole might have time to get to the pool for part of today's practice.
But that probably wouldn't happen if they were busy trying to solve a mystery.
"I agree with Maggie," Henry told Cole.
"I think we should try to solve the case. Daisy seems really upset."
"Good, then let's get started," Maggie said.
"Why don't we—" She stopped talking when Ms. Wood hurried up to the lemonade stand.
"There you are, Maggie," the stable owner said.
"It's time to get Big Spot ready for your first class."
"Oh, right." Maggie slapped her forehead.
"Sorry, Ms. Wood. I got distracted."
She started to follow Ms. Wood toward the barn.
Then she rushed back to the lemonade stand and whispered, "You guys should start investigating!"
Henry nodded as Maggie hurried off again. "Okay," he said to Cole.
"We should start by checking out the scene of the crime.
Maybe the thief left some clues."
Cole glanced past him. "Here come some more customers," he said.
"Why don't you serve them while I go look for clues in the barn?"
Henry was surprised that Cole was volunteering to look for clues.
Cole hadn't seemed very interested in the case.
But Cole rushed off before Henry could say anything about that.
"One lemonade, please!" a little boy cried, tossing a quarter on the table.
"You got it," Henry said, reaching for the nearest pitcher.
For the next few minutes, he was too busy to think about the case.
Finally the latest group of lemonade customers had all been served.
Henry looked over toward the barn.
Henry guessed that Cole was still inside looking for clues.
He thought about going to help him.
But he wasn't sure he should leave the lemonade stand.
Then he spotted Daisy walking past, leading a pony.
The pony was a little taller than Maggie's favorite pony, Big Spot.
It had a glossy brown coat and a black mane and tail.
Daisy led the pony into the shade of some tall trees nearby.
She leaned against one of the trees, and the pony began to graze.
Henry looked around to make sure no more lemonade customers were coming.
Then he left the lemonade stand and hurried over to Daisy.
"Hi," he said. "What are you doing?"
"Coco likes to roll in her stall," Daisy said, gesturing toward the grazing pony.
"I'm trying to keep her moving so she doesn't get dirty before our classes.
Did you find my show shirt yet?"
"We're working on it," Henry said.
He opened his mouth to ask her more questions about her show shirt.
But then he noticed someone rushing toward them.
It was a girl around Daisy's age with a long blond braid. She looked angry.
"Hey!" the girl yelled, ignoring Henry and pointing a finger at Daisy.
"You stole my pony!"