Shen Gui falls into a deep slumber for three hundred years. Upon waking up, he discovers that the five small beasts he casually adopted back then are no longer what they were in his memories. Black dog, white fox, crow, black tortoise, and green snake each carry earth-shattering backgrounds, yet once suffered suppression and bullying in order to protect their master. As the seals loosen one after another, the five pets gradually reveal their true identities, and the master who slept for three hundred years finally discovers that five peerless overlords capable of shaking heaven and earth are hidden right by his side. Faced with the invasion of old enemies, the five beasts return to protect their master, and a grievance spanning three hundred years unfolds along with it.