Nina is dead and must make amends.

In life she refused to use her unique ability to see whether a soul ascends to Heaven or descends into Hell. Now, as a guide through the Passage between the living and the dead, she steers departing souls to Purgatory. But peace is hard to come by, even in the afterlife. Good and evil are fighting for control over the Passage--and Nina is determined not to let Hell take over.

Roman breaks the dead guy rules.

With his devilish charm and angelic looks, the newly-dead Roman can rally souls to fight—but on which side? His new Soul Retrieval Unit sounds like a good idea, but even in death, temptation lures Nina farther from salvation . . . or is she choosing Heaven by placing her soul in her lover's care?