Book of the Yellow Springs

Huangquan, the most mysterious assassin organization in the martial world, can kill royalty and nobility above, and destroy martial sects below. Tianzhou, known as the all-knowing of the world, can sell any information for money, from a woman's secret to a nation's defense. By fate, the head of Huangquan fails in his breakthrough due to old age, setting off a storm that affects the fate of both Huangquan and Tianzhou.