It's a story about a world where magic is real and where guilds have to do jobs with their magic. It's about a read-haired guy named Natsu and his flying cat Happy who met a girl which wanna go to the guild "Fairy Tail", because she thinks they are the coolest guys out there.
This girl, Lucy, gets in trouble and Natsu helps her and tell her, that he's from Fairy Tail and she could join the guild.
And so the saga begins.
Also here the japanese site, some pictures and the intro (from yt):
