Extraordinary, i'm not suspecting the ending though, but i must say, that producer sure know how to mislead us into another storyline while the real ending is kept secret until the very end.
The story itself surely not only it depict the feeling of loosing someone due to a certain illness, but it also depict the feeling of suddenly loosing someone to a unimaginable circumstances, like for instance got killed by someone as shown in this film. I see that this movie not only teach us how to cherrish something that we had now, but it also reminds us that life sometimes took an unexpected turn and we must ready for anything.