Years passed... Years have passed since this accident in the laboratory, which has cost to an innocent being an imprisonment for life. This is also many years that Dr. Robotnik devised robots to surpass and eliminate the world's fastest blue hedgehog: Sonic the Hedgehog. He had built several prototypes such as Silver Sonic or Mecha Sonic. But this time, he created a robot, the perfect opponent for Sonic in every way.

Code Name: Metal Sonic.

"... Loading... 100%. Charged."

The robot's eyes lit up. Facing him was his creator. He had time to fix a couple of bolts before a few steps back. He felt a little nervous; he had to remember this terrible accident, 3 years ago.

"Scan in progress... ... ... Doctor Ivo Robotnik... Creator..."

The doctor heaved a sigh of relief. The robot was under his control. All the fears he had disappeared on him. To test his intelligence, he asked him several calculations - that he success every time. Finally, he made a complete analysis; his joints and engine worked swimmingly.

"Perfect... You're perfect." he said with a malicious smile on his lips.

The robot looked around to scan the surroundings. Everything was new to him, but he didn't know the curiosity. Besides, he feels no emotions; he was the slave, see the puppet of the doctor. And, as a slave, he must obey the orders of his master. The only problem is that he had no plan in reserve. It was then that he plunged in his thoughts. The robot was still currently scanning the room until his eyes fell on a screen. The doctor looked at him, imagining that he might find an idea of a plan. On the screen, he saw the famous blue hedgehog, running at lightning speed; ie he must surpass and eliminate him. However, he wasn't alone - a pink hedgehog ran after him. Probably an admirer, or even a girlfriend. This is when the doctor had a genius idea. He turned to the robot.

"There is your first mission: capture this hedgehog!" he exclaimed, by pointing his target on the screen. "I'm sure Sonic is very attached to her. You capture her and you will bring her to this specific point."

He gave to the robot the coordinates. Then, he turned to the screen and began to scan Sonic.

"Sonic the Hedgehog... Target #1... Eliminate... Eliminate!"

The doctor laughed sinisterly, while the robot went away kidnap the pink hedgehog.

A sunny day, with no clouds: it promised to be a beautiful day. Sonic traveled the hill, exploding in passing several robots. Everything is announcing perfect for the hedgehog, almost... Recently, a pink hedgehog wouldn't stop chasing him. Just to stop for she jumps on him. In addition, he has never met her before...

"Sonic~!" she cried, joyfully, running after him.

The hedgehog, out of nerve, suddenly froze and turned to his admirer.

"Listen, I'm starting to get fed up. I'd like to be alone." he said, keeping his anger.

The pink hedgehog felt a little embarrassed. She even began to blush.

"I... I'm sorry... I would not you to get mad..." she confessed, in a timid voice.

Sonic sighed heavily, ears lowered. He lifted his head; she was much younger than him and had an angelic face. The blue hedgehog felt obliged to talk to her on a more friendly tone.

"Okay, I forgive you. What's your name?" he asked.

The hedgehog blushed even more.

"M- My name...? ... Well M- My name is Rosy..." she replied.

Sonic smiled; she had bad taste in clothes but she was charming. Suddenly, a noise came from behind the bushes. The blue hedgehog went toward the sound. Nothing. Absolutely nothing. No animals, no people. He turned around. Rosy was gone! He heard a scream afar.

"SONIC! HELP ME!" she screamed, panicked.

A robot took her on his shoulder and fled. The blue hedgehog tried to catch him. In vain... He was very confused and surprised; he ran faster than him! Faster than the fastest person on the planet. He had only the time to observe the features of the body of the kidnapper. He couldn't believe his eyes.

"Another doppelganger of me? No, impossible... He's too fast...!"

He finally started off to free this Rosy and learn more about this robot who manages to match his speed. He was determined to discover...

… who he was.