His Saving Angel

She was the world's deadliest assassin. He was the Don of the most powerful mafia family in Milan, Italy. They both had a darkness inside them that was slowly taking control over their minds. They had believed that there was no escape from the darkness. That one day the darkness would consume them entirely and they would no longer have their humanity. His family believed that if he found someone they referred to as his saving angel that he would be saved. She simply believed that she couldn't be saved. That there would be a day when she didn't even recognize herself in the mirror. But what happens when these two meet and they do end up saving each other? And what happens when their newfound happiness is threatened by enemies from their pasts?