What is the exact meaning of くれ here:

> 
> Will you come with me?  
> 
> いっしょ　に　きて　くれます　か？ / Issho ni kite kure masu ka?
> 
> 
> 

Why would it not be this instead:

> 
> いっしょ　に　きて　します か？ / Issho ni kite shimasu ka?
> 
> 
> 

Or do they both mean the same thing? If so, is there a different inflection? As くれ signifies the giving and receiving of something, in this example does it me the giving of someone's time?

I've only mastered the hiragana syllabary to date, so if you could please stick to hiragana in any answers, that would be great.