The show is based on the DC comic the Green Arrow. After a violent shipwreck, billionaire playboy Oliver Queen was missing and presumed dead for five years before being discovered alive on a remote island in the Pacific. As Oliver reconnects with those closest to him, he secretly creates the persona of Arrow - a vigilante to right the wrongs of his family, fight the ills of society, and restore Starling City to its former glory. By day, Oliver plays the role of a wealthy, carefree and careless philanderer he used to be while carefully concealing the secret identity he turns to under cover of darkness.
I didn't follow the show at first because I was skeptical, but I read some great reviews about it and decided to watch it. Now I think this is probably one of my favorite shows, I just hope it doesn't go downhill from here. I'm not great at writing reviews so I won't even attempt to, all I can say is watch it and see if you like it as much as I do.