You'd think that helping people would be easy if you were an angel. Frankly, they thought so too before taking God up on the opportunity to eat the fruit form the tree of knowledge of good and evil. Now, finding themselves in human form, they embark on a journey of thousands of years learning not only how not to make matters worse, but how to eventually teach human beings it's possible to make things even better than they might suspect. If they succeed, they get to reunite with their selves, having divided in two after eating the fruit, as well as, ultimately, the Creative Divinity, divided from or not, they all ultimately serve.