Louis, a former bank "pure horse", died suddenly due to overwork, but was accidentally bound to the "ejaculation system". The system told her that only by persisting in "being a monster" every day in the nine "dog-blooded" worlds and collecting enough "spirit points" could she finally get rid of the fate of "cow and horse" and gain the freedom of reincarnation.
From the initial incompatibility and resistance, Louis gradually understood the essence of "making" and turned "making" into an art and a weapon against injustice. In every world, she completely reversed the tragic fate of the original owner's oppression, and used her thunderous "action" power to make those who had oppressed and despised her suffer the consequences.
In the process of traveling through nine worlds and completing a series of "crafting tasks", Louis not only gains powerful power and ultimate freedom, but may also meet partners in some worlds who are in tune with her soul and can appreciate and support her "crafting", and even develop a bond that transcends the limitations of the world. In the end, she gathered all the essence points and successfully reincarnated. She completely bid farewell to the "cow horse" life and became a "devil ancestor" who truly controls her own destiny.