Martin is a Good Name for a Lawn Gnome

It was a normal afternoon. Norman Bufort was quite happy. He, Marcus, Herb, and Mr. Burton were to take a trip to Miller's One-Point-Two store, where everything goes for $1.02. As Norman stepped out of his house, however, he was surprised to find a lawn gnome in his path.
The best stories always begin with a lawn gnome in someone's path.
Well, Norman didn't see anything special about this lawn gnome at first. He had plenty of lawn gnomes in his garden. This one looked like the others, save for the Bermuda shorts and the ukelele he was holding. But as soon as this one said, "Hey, I got an offer you can't refuse," Norman knew things would never be the same.
"What do you mean?" Norman said.
"I'll trade you some Xenon for a dozen dirt clods." (Lawn gnomes, if you didn't know, have a thing for dirt clods.)
"Xenon!? What's that?"
"It's a noble gas," replied the gnome.
"I don't think I have any use for a noble gas," replied Norman.
"Suit yourself," replied the gnome, "but if you ever change your mind, just drop by the garden and ask for Martin."
Norman Bufort thought about how that name was quite a good one for a lawn gnome, but after that, he didn't think on the tiny plastic man anymore. Instead, he went to go find his friends. Herb's house was the closest, so he went there first.
As he approached, he thought he heard a low humming sound. The closer he got, the louder the humming became. Beyond the hill in front of him, a faint yellow glow pulsated close to where Herb's house was. Norman quickly ran up the hill, and the sight before him shocked him. There, hovering in the air, was a UFO. Beneath its round hull, a bright blue beam of light shot to the ground, and in the middle of that beam Norman could see Herb being lifted into the space ship. "Woo-hoo!" screamed Herb, "Take me to Earth!"
Norman quickly ran after the UFO, having no idea how he was going to save Herb from its grasps. He was too late. The UFO flew off into the sky with Herb inside, cutting through the air with the sound of an eerie siren. Norman was left behind in shock. His elderly friend had just been kidnapped by aliens right before his eyes! Norman looked to the ground and saw a piece of paper. Apparantly, it was the last thing Herb had written. On that piece of paper were the words, "When I came," but that was all. Norman looked up at the sky. The mystery had only begun.