I don't own Detective Conan. (Wish I did but I won't hold my breath.)
I'm sorry for any typos and formatting problems in these two chapters, every thing gets really weird when I download it to Fanfiction.

Inside the garden shed were a lot of rakes, shovels, and hoes, but only the ones near the door appeared to have been used recently. Farther back from the door were rusty tools with splintered handles festooned with cobwebs and dust.
"I doubt there's room for someone to commit a crime in here." Said Arthur.
"Wait a minute," Said Conan "Along the back wall behind that old wheelbarrow it isn't as dusty. Here, help me move it."
They grabbed the wheelbarrow that was upended against the wall and managed to shove it over so it rested against one of the piles of junk.
"Look! There's a door here."
"But it's locked"
"No problem," Said Arthur as he examined the lock. "I could pick this kind of lock since I was four." As he said that the lock snapped open.
"See."

Inside was a well-lit room with no windows and only the one door. Unlike the first room there was hardly any dust and no junk except an old ladder in one corner. Conan and Arthur looked around in surprise before Arthur said.
"I've got a feeling we should get out of here." When Conan turned around to answer Arthur he turned pale. Arthur whipped around to look behind him but before he could move a hand grabbed him by the collar and lifted him half off his feet. He struggled to get away but the grip was shifted from his collar to his throat. He couldn't breathe! He tried to get loose, to breath; anything but it was no use!
Everything seemed to be getting dim as he heard a voice say.
"I've got this one, you take care of that little brat." The last thing he saw before he passed out was the gardener carrying a coil of rope and grabbing Conan, who looked terrified.

Meanwhile on the far side of the rose garden Ran was searching for the two boys. 'How can Conan disappear so fast?' She thought 'and if anything, Arthur is even worse! Maybe they're by the Koi pond.'
She had been looking for quite a while when she heard a shout.
"Conan?" She ran towards the sound, hoping that wasn't Conan who made that frightened, panicked sound.

The first thing Arthur noticed was his neck hurt. Also his hands were tied behind his back and he was lying on his side on something cold and hard.
"Welcome back Kid."
He opened his eyes to see Conan kneeling near him. Conan's hands were behind his back, his glasses were missing and he had a red mark on his cheek.
"What happened?" asked Arthur.
"We got caught, tied up, and thrown in here with Taro-san. And you were half strangled and unconscious."
Arthur didn't hear anything after 'thrown in here with Taro'. Conan continued to explain
"Taro wasn't killed they just wanted everybody to think he was."
"Where are we?"
"In a room under the shed."
Arthur squirmed a moment then slowly sat up steadying himself with his hands, the rope that had been around his wrists now lay, still knotted, on the floor next to him.
"Are you tied up too?" He asked Conan.
Conan just gave him that look, the one that expressed his opinion more clearly than any words.
"Jeez! Just asking, I'll have you loose in a minute."
In no time at all both boys were free and Arthur was looking around at the room. Light came from one dim, bare bulb that hung from the middle of the low ceiling. The walls and floor were cement and along the far wall was a man sitting on a thin, bare futon. One arm was chained to a heavy weight that lay next to the futon, the other arm was bandaged with strips of cloth torn from his shirt. A bucket was just within reach of the chain and appeared to serve as a toilet.
'Well that explains the smell' Thought Arthur.
The man stared at them, "How did you do that?" he asked as he pointed at the rope.
"He thinks he's a magician." Said Conan.
"Wait an minute! Who is that, who grabbed me and why did you look so scared up there?" Demanded Arthur.
"I didn't think anybody but Ran could scare you that bad."
"He's Nakajima Taro, and I'll explain the rest later. First let's get out of here before anybody comes back. Can you undo the chain?"
"Of course." Arthur went over to Taro and began to work on the chain around his wrist. The only entrance or exit to the room was a trap door in the low ceiling Once Taro was free he pushed the trap door open and boosted the boys through. Quickly they pushed the ladder through the door to Taro, who used it to climb out. Arthur shut the trap door, hoping it would buy them some time if anyone came back, and Conan found his glasses on the floor.
But as they got to the door out of the shack it opened. A silver-haired man in a black trench coat and hat held a gun on them.
"Well what do we have here?" he asked.
"Gin." Whispered Conan so softly that Arthur barely heard him. Taro stepped in front of the boys
"When he shoots me, you two make a run for it." He whispered.
The man laughed, a chilling sound,
"Don't try to be a hero. You can't save the brats that way, the bullet will go right through you and hit one of them"
"At least I'll try." Said Taro, his voice low and angry.
"I have a better idea. Have the brats eat one of these." Said the man as he tossed a pill case to Taro. "They'll wake up with no memory of the last few hours and you'll come quietly with us."
As Taro opened the case Conan saw the red and white pills inside.
"NO! It's poison!" he shouted."
"Well if you won't do this the easy way... Mescal, get in there!"
As the gardener came in the shack Taro and the boys backed up slowly. From his position behind Taro, Conan got ready to shoot a sleeping dart at the man.
Suddenly the man in black tried to turn to aim at something outside. It was Ran! She was too fast for him, with one kick she had him unconscious on the ground.
Conan shot the gardener while he was distracted by this and before the dart could take full effect Taro brought him down with an uppercut to the jaw. Arthur grabbed the pills when Taro dropped them, then he followed right behind Conan as he ran out of the shack.
The two men were quickly hog- tied while Ran called her father and the police with her cell phone.

The police and Kogoro arrived almost simultaneously and the two men were hand cuffed before they awoke. And Taro began to explain,
"When I was in high school I liked to party and one time, well later I figured out that someone put some thing in my drink but at the time... All I knew was that when someone suggested we break into the school and 'Have some fun.' I went along with it. We trashed a few rooms and spray painted the lockers.
Somehow a fire got started, we all got out ok but the school burned down, and I was too scared to tell anyone. A few months ago Suzuki, the gardener started to blackmail me with this. If I didn't pay him he would give my dad proof that I had been involved with the school burning down. He kept demanding more and more money; I even used my dad's security codes and passwords to steal from the company to pay him.
A few days ago he demanded money again and I had had enough. I said I was going to the police and telling them my self."
Taro took a breath as though to gather the courage to continue,
"I should have gone right away but I wanted my parents to hear it from me first. That night, after the party Suzuki and that other guy grabbed me, I've been chained up under that shed since.
I don't think Suzuki was his real name, that other guy called him Mescal. They wanted me to give them the codes I used to access my fathers computer.
But I knew that once they got what they wanted they wouldn't have any reason to keep me alive. I would still be there if it wasn't for these two little detectives."