Ok first of all they completely copied the general trope of oh girl heir.
OH no boy is born now the king only cares for him
so the sister kills and everything
then she is burned at the stake and becomes a demon and does more drama
Oh no now they released the demon by opening the dungeon
like bro that is sooo overused
anyways suddenly there is a another locked ghost or something
and now they completely waste the opportunity of the locked ghost
wait a second, a fight is about to happen
oh wait thats not the villain
oh wait that is also not the villain
oh no villain is the guy who we thought was the hero all together
queue amazing fight scene....... wait actually what if we never fight
yeah its better with family coming together
oh wow forgiveness and salvation
oh no movie over
the only thing saving that was the funny scenes
they did make me crack up alot