On a rainy night in Jiangcheng, second-hand bookstore owner Chen Yan accidentally activated the Burning Front Seal on his left arm, and was involved in a "contract keeper's mission" that spanned thousands of years. He is a descendant of the ancient Burning Front, and the green-gold Burning Fire beating in the palm of his hand is the only hope to restrain the "Eternal Night Energy".
The Eternal Night Religion has quietly revived. The Shadow Messengers control the rotting creatures and the Blood Contractors absorb spiritual energy. They use the fragments of the contract as a guide to open the "Gate of Eternal Night" in the ancient platform of Sinking Water, awaken the sleeping Lord of Eternal Night, and plunge Jiangcheng and even the world into eternal darkness.
In order to protect the city, Chen Yan gathered his fellow Contract Keepers with different personalities: Su Yao, who can control golden paper butterflies, Zhang Meng, a tough guy who carries the evil-busting stick, Li Xuan, who is proficient in runes, and Chen Xi, who masters the energy of the wooden contract... They fought against the remnant soul of Zhu Yin in the Lingshu Tower, tracked the new rotting spirit in the sewers, and faced the true form of the shadow in the ancient bridge. Finally, they formed the "Contract Keepers Alliance" to jointly resist the general attack of the Eternal Night Cult.
When the cracks in the Gate of Eternal Night glowed with a deep purple-black light at the bottom of the river, and when Fen Feng Fire merged with the Four Elements to form a "four-color light blade," Chen Yan finally understood: The mission of the Contract Keepers is never to fight alone, but to use flesh and blood as a shield and faith as a fire to build an invisible barrier for ordinary people before darkness engulfs the world.
