In a modern city where aura is recovering, ancient martial arts families coexist with emerging superpowers. Three young masters with mysterious backgrounds and unique skills came down from the mountain to join the world for their own reasons. They thought they were just completing a simple training mission, but they didn't know that they had been involved in a huge whirlpool related to the survival of human civilization. When ancient martial arts skills collide with technological powers, and when mountains and plains encounter urban calculations, how will they keep their true intentions, uncover layers of fog, and become true guardians in this bizarre era?