Attention all fans of the show: If you wish, you can skip past the prologue, as it's just the start of the show; if you need or just want a refresher, or perhaps are unfamiliar with the show - Which, in that case, why are you reading fanfiction for it? - Then by all means, read the prologue. Otherwise, continue to Chapter 1.

Kai's day could have gone better. It should've been a typical day in the shop, but It got weird when an old man, from out of town, came to browse the shop. The man wore a rice hat that shaded his wise old eyes. The wrinkles in his face held a fading scar from his youth. His hand clutched a bamboo staff that he used to support himself.

"Your metal is slow and heavy," the wizened man stated. "Useful to slow one down; useless in the art of stealth. All tools for a samurai, but none for a ninja?"

Kai had gotten a little irked when the old man scoffed at their lack of stock. Their little shop mainly shoed horses and fixed farming tools. The samurai equipment was there for show and to prove they could forge anything.

"The shop is called Four Weapons, not For Browsing," Kai sharply informed the old man "Either buy something or go peddle your insults somewhere else."

The old man muttered something about finding something special here, as if he had intended to come to this particular shop. Unfortunately, Kai had been too aggravated to pay him much heed.

Shortly after the aging man left, all hell broke loose, literally. Skeletal men rode over the hill, threatened the villagers, and attacked the shop. Kai had just enough time to gear up and give his sister, Nya, instructions before he met them in battle.

Kai fended one after another off but to no avail. Not being truly alive, these 'men' couldn't be killed. Kai ducked and dodged, swinging his blade with careful precision. His sword had no effect; most of the time it would get caught in their ribs, and even when he was able to damage to them, the only thing he could do was break their bone off. Kai quickly came to the conclusion the best he could do was slow these skeletal men down by literally hacking them to pieces.

After what seemed like a long time, Kai found a familiar figure at his back, Nya. Normally Kai would've tried to send her back inside, but in this case, he was glad to have someone he trusted there. Together they parried and blocked the bone weapons. With two of them, they created a ring that they defended until they fought their way out.

The skeletons started scattering. With a nod to each other, Kai and Nya split up to drive them back where they came from. Kai spotted one that was slightly different from the rest. He was broader and taller than the other skeletons. His head was bigger, displaying dark, empty eye sockets. Kai was sure he was the one calling the shots.

The skeleton grinned wickedly at Kai when challenged. He only realized why too late. The skeleton drew four swords from behind his back, with his four hands. Kai realized too late just how outmatched he was.

While Kai had trained and practiced with swords all his life, he wasn't prepared for the strength the skeleton possessed. Kai was quickly disarmed and thrust to the ground. His armor, being slightly too big, made it impossible to regain his feet without assistance. The skeleton slowly approached Kai, ready to end him. Suddenly the old man from before stood between them.

The man and skeleton exchanged 'greetings' before fighting. Both were swift and agile, considering one was old and the other was solely bones. Kai tried to regain his feet, but with no luck; the armor was simply too heavy.

Samukai, which was apparently the skeleton's name, threw three of his blades into the unstable water tower frame. (Kai had meant to fix it.) It swayed before lurching toward Kai who was still struggling. For the second time that day, Kai was sure this would be the end of him, only to be saved by the old man yet again.

Even with all the action Kai had been surrounded by that day, there were only two things he remembered clearly. When Samukai yelled, "Lord Garmadon says, take the girl!" and Nya's piercing scream when a bone hand snatched her away from him. Kai had run after them, but it made no difference. Samukai got away with his sister.

In a rage, Kai had whirled on the old man looking for someone to blame. The old man was calm and reassuring. He told Kai there was nothing he could've done. Kai, in turn, decided he had to go after Samukai. The old man (who introduced himself as Sensei Wu) informed him, "Where they go, a mortal cannot."

Samukai was from the Underworld, which explained why they were all skeletons. He also worked for Lord Garmadon, Sensei Wu's older brother. It seemed Garmadon was after the Golden Weapons, which Wu had hidden after the battle with Garmadon that had cast him to the Underworld. Wu was an old friend of Kai's father and had entrusted a map with the weapon's locations to him.

Kai was crestfallen. Not only had they gotten away with his baby sister, but they also had a map that would lead them to dangerous weapons. Feeling responsible, Kai accepted Wu's offer to train under him, to become a ninja.