Zack had arrived on Earth only a few days ago. He quickly learned to hid his skin color. Fortunately his species was good at adapting. He had tried his luck in a smaller town, but strangers attracted took much attention. He decided that the big city was his best chance. There were more people there which encreased his chances of finding a mate. As he walked through the crowd he looked at his ring. It's had been designed by the scientist of his world to find women compatible with him. He didn't understand how the ring could tell him if a women of another species was his mate, but it was all he had. Suddenly the ring went from red to green.