Three thousand years ago, Cheng Qi was the son of Shen Long, and A Lin was a celestial nymph. The two teamed up to break Nightmare's conspiracy to dominate the celestial realm, but the two of them lost their souls and wandered into the mortal world. Three thousand years later, the entangled couple met again in the world. A Lin and Cheng Qi formed a monster-catching team to break the nightmare formation and break the puzzle set by the nightmare.