The true meaning of love and martial arts

this story is about 2 sisters who can only rely on each other and their aunt. when all of a sudden there world is turned upside down when they hear about the death of their aunt. the story of her death is a little fishy,and a letter in her belongings telling them about were they really came from. so to find out the truth about there aunt's death they have to find out the truth about the past. and on the way they find love when they least suspect it. will the truth they find be to dangerous for them to bear ?