Gosu

The anime follows a young man, the disciple of a once-mighty martial artist. His master was betrayed by his own followers and barely survived, leaving him scarred and weakened. Now, the disciple is armed with his master's formidable martial art techniques, ready to unleash his wrath and sow chaos throughout the murim, a world of martial arts. He prepares to confront those who wronged his master, seeking retribution for the betrayal. However, upon embarking on his quest for vengeance, he makes a startling discovery: the very people he seeks to punish are already dead. This unexpected turn of events leaves him in a quandary, forcing him to re-evaluate his mission and his place in the dangerous world he now inhabits.