The apocalypse is coming, zombies are rampant, and human civilization is crumbling. Zhou Mufeng, a down-and-out rich second generation who was betrayed by his girlfriend and betrayed by his brother, accidentally obtained the "contract system" - as long as he signs a contract with another person, he can obtain a certain ability or resource of the other person. In this world of cannibalism, he relies on his suave appearance and eloquent eloquence to deal with the major forces. However, when he discovered that his ex-girlfriend had turned into a mutant zombie king in the zombie wave, a bigger conspiracy surfaced - this apocalypse was not a natural disaster, but an experiment created by a mysterious organization. Zhou Mufeng's contract system is the product of this organization's biggest bug. He must use the power of the contract to establish his own power and uncover the truth of the doomsday before the organization discovers it. As the number of contractors increased, Zhou Mufeng found that with every contract he signed, he seemed to be one step closer to being "inhuman"... When the boundaries between doomsday and human nature blurred, and when contracts became shackles, how could Zhou Mufeng hold on to the final bottom line?