You are a super hero. You've got special powers (that you, the player will design), and you're ready to save the world. It's your first day on the job. What could be more exciting?
Well, you're training was a bit lacking due to budget cuts, so figure it out as you go. Don't make too many mistakes though - the insurance companies don't like collateral damage! Keep the world and yourself safe, learn the ropes, and settle in to your first real, super Big Boy/Girl job.