Chances are low, by default, but there is no harm in trying.
When you are crafting your essay/story, try to pick a mission statement (something you actually care about outside of grades) and build on it. You don't get in just by having good grades, nor do you get in by virtue of ticking boxes with your application.
If your school has a US counsellor, get in touch with them. The US admissions landscape is very different to the UK, it's a much more involved and personal process.