Despite needing a heart transplant, Mary Catherine moves to Uganda to work at a new orphanage. Whatever time she has left, Mary Catherine wants to spend it helping children. Neither Marcus Dillinger, the man she never meant to fall in love with, nor Mary Catherine's other friends -- Tyler Ames and Sami Dawson -- know how serious her heart condition is. Marcus is certain something is wrong, however and his feelings lead him on a mission to rescue her. Tyler and Sami struggle with their relationship. The angels are busier than ever in this story of love, sacrifice and the power of faith.