Jiang Suisui accidentally time-travels to the ancient beast clan era, awakening the mysterious "Myriad Phenomena Beast Appraisal System". The system transforms into a Classic of Mountains and Seas illustration interface, capable of appraising all beasts, listening to beast hearts, and searching for secret treasures, but it happens to bind an amnesiac ancient powerhouse Cang Ming, as well as a "little ancestor" contract-breaking ant specialized in dismantling contracts and breaking arrays. In an ancient world where divine beasts are imprisoned and fake contracts run rampant, Jiang Suisui relies on her wisdom and system abilities all the way to dismantle fake contracts, rescue divine beasts, and uncover the ancient secrets behind the myriad phenomena beast manual. She discovers that Cang Ming is not an ordinary beast clan, but a mysterious "dragon key" affecting the dragon court ruins.