In a nutshell. Two friends, who care for each other, embark on a journey where one finds out he is dying of an incurable cancer. The other friend is hurt, knowing he is about to lose his best friend and understandably doesn't want him to die. They become closer to each other during the situation and you see both their views on life. It is a powerful story about friendship and one that will cause you to weep.
The movie may hit home to others who have faced a similar situation in their lives, and may cause others to feel the pain of both characters in a more intensive way.
The story drags out in certain areas, as becomes mundane in certain scenes. Yet, it can be used as a tool to help other people in these situations to reflect on circumstances that are outwith our control.