A war between the unseen

When Samantha thought about death she imagined old people and peace. But when she dies in a tragic accident at exactly 16 she learns death is not what its cracked up to be. Death for her isn't paradise, it's working as a Grim. A system that had been working for centuries falls apart throwing the balance of the world into chaos. Samantha finds her self in charge of fixing it with the worlds most annoying Angel Ryan and their teams. Can they stop bickering for 5 minutes to fix the balance? Probs not.