When her boyfriend’s doctors are unable to treat his fatal illness, an unsophisticated Papuan girl must convince him to travel to Papua to allow her Medicine man grandfather to save the love of her life.

Honestly, I think this is the best version of this logline that you have attempted, and I ‘get’ the story from this logline. You have been pretty close the last few attempts and I think this one is the closest to what gets the story across!