Trained since youth in the legendary Defying Heaven Art under a foreign master, he rose through the ranks of an elite special forces unit, becoming a feared assassin whose very name struck terror. One mission gone wrong forced him into early retirement—a quiet life he thought he'd finally have. Instead, fate thrusts him into the role of personal protector for a stunning school heiress. When cultivators from a hidden realm intrude into their ordinary world, he discovers that his greatest battles are only just beginning.