Song Bing, a veterinary medicine student, accidentally binds himself to a special system that allows him to absorb illnesses and transfer them to others at will. Out of kindness, he cures several patients with terminal illnesses, only to be repaid with betrayal by the very people he helped. His ex-girlfriend frames him in court, leaving him banned from practicing medicine. With his heart grown cold, Song Bing changes his outlook and opens a veterinary clinic, quietly treating animals and accumulating abilities. He settles accounts with every person who suffers the backlash and comes begging for mercy. Undeterred by threats and schemes from powerful families and pharmaceutical companies, he strikes back step by step, seizes power, dismantles his opponents' forces, and settles every grudge and debt. Finally, he leaves the shadows of his past behind, finds true love, and begins a new life.