An ancient family hidden in the modern city bears a millennial contract to guard the mortal world. Ordinary teenager Lin Chen never knew that a special lineage flowed within his body. Until bizarre disasters appeared one after another and those around him fell into danger one after another, his slumbering bloodline finally awakened. With destiny laid out before him, he is no longer an ordinary teenager. Family heritage bestows upon him power, yet also brings a heavy price. Facing the surging dark crisis, Lin Chen embarks on the path of guarding the world, using the power of his bloodline to combat calamities, and using himself to protect the myriad living beings of this world.