Your writing is actually rather good, but there is still room for much improvement. Keep in mind, I tell you what is wrong with it only to help you, and it by no matter means the story is bad, merely has more potential.

For example, in the first bit, instead of saying: "They were used to a warm extravagant apartment and the streets weren’t so warm. Especially when it’s December and there is a snowstorm raging above." you need to try something like this:

"The travelers were used to a life of luxery and relaxation, where a roaring fire greated people every few rooms or so. However, the harsh streets were not nearly so friendly or forgiving, espically this Decemember as a storm of snowflakes raged above them."

Overall, just trying use more description. Draw us in and make us feel fear, excitment. Readers want to feel their hearts pound and the blood pumping in their ears as the character does. Make us feel every second, every swing, every moment and movement of what you think is important to the character. You show promise, just keep writing.

Very sincerely yours,

HR

You see, the object isn't to tell us the story, yet. Right now you're still describing and therefore have much more langsitic leanway. It's not bad, but could be better.

"The whole town-square was dark except a few dim candlelit lamps." ought to be replaced with something like: "The entire square would've been pitch black, if not for the few lights of candles creating the shimmer of light through glass windows"