A thousand years ago, the God of War Fan Yue, who bears the burden of the Heaven Tribe’s mission, falls in love with Mo Xuan, the demon lord. However, what stands in front of them is the war and feud that has lasted over 20, 000 years. After a series of turmoils, they decide to put aside everything to be together. However, a sinister plot caused them to be separated from each other. A thousand years later, they meet again in a war between Heaven and Demon Tribe. Together, they set out to uncover the real truth behind the incident that happened one thousand years ago.