Carrie is a soul collector - a messenger who carries the souls of the deceased to the afterlife. Alienated among her peers and supervised by her distant father, she is assigned to carry the spirit of her estranged childhood friend Marnie to the afterlife - but saves her at the very last second instead. As a result, Carrie and Marnie stumble headlong into a relationship, while Carrie tries to figure out a way to save Marnie's life for good.