Long Chen exhausts his savings to buy a despised, defective emerald-patterned spirit turtle and accidentally activates the Beast Taming Atavism System. The five-thousand-yuan useless turtle can evolve into the ancient fierce beast, blood-patterned savage turtle, crushing sky-high priced nurtured spirit beasts in strength. The law enforcement agency comes to search for the fierce beast, and his former girlfriend and a rich young master provoke him one after another. He enters the ancient realm training ground to rapidly grow stronger, vowing to take first place in the entrance examination and gather his father's medical expenses.