Sunyu of the Shadowless summary: Given the task of safeguarding a group of young orphans, Kwak Noh – a martial artist who had hit rock-bottom – originally aimed to find suitable homes for them. Eventually, he grows attached to the children so much that he decides to nurture them as pupils of the Shadowless Clan. But as he struggles with financial woes, Sunyu, the eldest brother of the clan, must take over and cater to his younger siblings. To do this, Sunyu must go through intense training to improve his skills.