Well I'm in Australia at the moment and unfortunately I have nothing to do so I've decided to write a story on the spot

Someone asked me to write a story for a comic and I brainstormed a few ideas. This is my first go at putting it in story form (last form was in comic):
"Crap," Exclaimed Sam as he kicked a rocked under the moonlight. "I can't go home now. Sis took the spare key and she's probably gonna’ pull another all nighter at work."
Sam came up to the beach. The beach was located off the edge of a road connected to the street Sam's house was on.
"Looks like another night on the beach," he said, eyes empty of any possible enthusiasm that may have once existed the first hundred times he had to do this, much for the same reason he'd be doing it again tonight.
Sam lay down on the grassy patch close to the water but not quite sandy. The cool air blown off the water kept bugs and insects at bay so sleeping outside was no different than sleeping inside when Sam and his elder sister couldn’t afford to keep the heater on all night.
Sam’s eyes instantly began closing, slowly at first but soon they were shut. The moon was almost right above him and Sam’s day at school had been filled with rigorous PE exercise.
A dream like state reached him. The just barely audible wind acted like a lullaby and the moon; a dim but sure promise that when he awoke he could find his way home. The grass was always soft as it grew in well nourished soil, this due to Sam growing the grass himself. His mind pondered various adventures he could partake in and he began slipping, his arms a pillow behind his head, into a world he thought far more interesting than reality… but he was soon to find his thoughts incorrect.
Sam snapped out of his sleepy state when sea water entered his mouth. It was salty and though Sam managed to swallow it to his stomach rather than breathing it in, the taste as it swirled down his throat forced him to attempt to take a breath, but he couldn’t. Sam was stuck in some sort of ring that covered his mouth and something, of the same material, held his nostrils together so he couldn’t breathe in the water. At first Sam assumed it to be stone, but though his blurry vision he could see a hand holding his nose. Then he saw the water change from blue to red.
“I’m bleeding? Crap! I’m bleeding!” He cried out in his head. Though he tugged and pushed against the person holding him underwater he could not get free. Energy began flowing out into the water as Sam exhausted the oxygen left in him. His muscles ceased to follow directions and the blurry water became engulfed in blackness. He fell unconscious.
***
Sam awoke once again in shock with a great gasp. He didn’t open his eyes at first but he’d managed to regain consciousness somehow. A few more gasps of fresh air. The air carried the scent of sea water. “I’m still at the beach,” he though. There was also the smell of sweat and then something else that Sam didn’t recognise. He swallowed. His throat was dry but his mouth had been filled with some sort of fluid that eased the pain in his throat. It tasted like metal. He couldn’t figure out what it was. He could now open his eyes; the first thing in view was a large silver orb. Still night.
“Oi, get up,” a voice whispered. “You should have the strength to slay a dragon now so quit laying there.
Sam looked over. He couldn’t see properly yet but two tired eyes could still make out a male knelling next to him. He wore drenched clothes that were far to big for him and he carried a backpack and a sword in it’s scabbed tied on a belt around the strangers waist.
The man pulled the sword out and laid it next to Sam. “Fine, lay there for a few seconds longer if you must,” the male had irritation in his voice, “but don’t rest too long. They may return, if they do use this sword to defend you and to defend my sister. Know that if you fail my order you will die whether by my hand or that of my enemy’s,” the male then ran off into the street with a great speed.
Sam lifted himself to sitting position. His vision returned to normal and he swallowed again. He wiped his mouth. Blood, he’d swallowed blood when he’d woken up. “I must have bitten my tongue or mouth in the water and that’s why it all went red.”
The next item of interest lay next to Sam. He picked up the sword the man had left behind. The blade was over a metre long yet the sword was didn’t even seem as heavy as a pillow to Sam. He stood up and gave it a couple of swings.
“Well I nearly died, but I got a free sword out of it. Maybe I can sell this for something… wait… what would somebody be doing with a sword now day and age? Who cares, I’m leaving before he comes back,” Sam began to move off when he tripped over something.
“OW!” He cut his hand on the sword. Sam tried to see what he’d fallen over in the dark. He squinted, the moon had gone behind a cloud and the light was weaker than usual. “A log? A rock?” He put his hand down to feel what it was. It was soft, wet, squishy with a fuzzy skin “…A log with a rabbit on top that fell into the water?”
A faint voice drifted up into Sam’s ear saying, “…that… tickles…”
“Huh?”
The cloud moved from in front of the moon, shedding light on the scene. The voice came from the girl Sam had tripped over and was now groping.
He shot backwards and pulled his hands behind his back as he mumbled apologetic words of some sort in a fast almost impossible to understand frenzy of a sentence, “o-a, I’m soo sorry I just kinda tripped cause just were lying there- oh uh, not to say it as your fault- I mean of course it wa-“
He peaked up at her. She lay in the same place, eyes closed with a blue light reflecting off her wet skin and clothes. Just like Sam and the man that left the sword the girl was drenched.
“Uh… hello?” Sam asked as he walked towards her. She wore a black poncho which covered her entire body apart from her head. Sam bent down and tapped her check with the back of his fingers. She was asleep.
Sam tried to remember what the guy that had left the sword had said…
“’…don’t rest too long. They may return, if they do use this sword to defend you and to defend my sister…’ Yeah that’s what he said. So this must be his sister. But… who did he mean by ‘they’?” Sam’s question didn’t go long un-answered. A low growling noise sounded behind Sam mixed in with snarling. The sounds were that of a dog. Dogs often came down to the beach. Sam turned to shoo it off, but when he saw the dog he couldn’t move.
It was a mix between man and dog. The basic shape was similar to man in that it stood on two legs and had two arms hanging next to its torso. The head was more of a dog, however. A long nuzzle with whiskers and k-9 teeth below. Red, bloodshot eyes and ears that pointed to the sky. It was a man covered not with clothes but thick brown fur.
“Oh…” Sam managed to squeak out right as the dog-man growled loudly and jumped towards Sam with vicious intent written in its eyes.
---End of chapter one.
Now anyone who could be bothered to read all this, PLEASE help me make it better if you can. If it’s beyond repair just telling me to restart is also of some help too.