There is a big spoiler here, everything will be cleared up keep watching.
when young duan xu kidnapped and force to become assassin . His "as*hole" father , keep this info from public , and have young FangJi to act as duan xu , even duan xu sister not aware of that.
very interesting story, and awesome fighting scenes (wish there are more of them).
the extra ending is more fitting, thanks to feng yi action before.
Very good story, just need more fightin, will be much better.