Chasing Gravity ( BOOK 1)

Do all things that exist have a reason behind them? Its we humans who create the relations, same goes with a person's character, do we always need a reason to act bad? Can't it just be our nature, can't we find pleasure in commiting crimes?
That is who Gravity is, a girl bad without a cause.
Then there is Leo, our standard Mafia King who has it all, but wants a relationship with someone who can be his power not his weakness, what will happen when they both meet? Will leo be able to impress Gravity?