Daywalker summary: National Intelligence Service black ops agent 'Suhyeok' is tasked with assassinating 'Nanayama,' the Yakuza leader heading a drug trafficking organization in Korea. To his surprise, the target is a captivating woman named 'Anna,' who appears disconnected from any violence. Sensing something amiss with his mission, Suhyeok embarks on a path of vengeance against both the National Intelligence Service, which has betrayed him, and 'Nanayama,' who massacred his comrades.