A story concept means nothing. I can tell you now, it has been done before. What matters is how you write it, the characterization, the flow, the imagery, all of it. There's no benefit in asking what other people think of the concept! They'll either say,"Sounds great," or, "it sounds like a ripoff of..." If the idea stirs you, write it. Then ask people what they think of the final story. After they tell you what they don't like about it, revise it, usually several times, until you're happy with it or until you throw up your hands and say the hell with it. Please read this thread about What is Plot Creation and Development? As the writer, you really need to develop your storyline, and the plots that comprise it, yourself. You already have principal characters. You already have one seed for conflict, that of prejudice, that you can build upon. What if your hero is a closet bigot, who considers himself an enligtened liberal, but whose head is filled with stereotypes? What if your heroine secretely resents her Latina heritage, and feels it is the cause of all her career obstacles? Play the "What if?" game every chance you get. That is what all fiction springs from. And remember tat conflict can be either internal or external. A good mix creates a good story and vital, interesting characters.
