Story Plot main idea

The story line to my production is based on a small neighborhood that is in a state of equilibrium, everything is good and well in the neighborhood, low crime rate, high employment rate and everyone in the neighborhood is happy and knows each other well. One day the main character in the film is on his way back from his friends, and he is being followed, he comes in to his room, calls his girlfriend and suddenly a figure appears from behind his curtain. After that we don't know whats happened.. who is it? Is the main character dead?