After transmigrating from a corporate drone to another world, he becomes a low-level zombie. How can he put up with that? Zombies and humans are different in all sorts of little ways...
With the goal of becoming a god and turning human, he begins cultivating among the various races, casting his net far and wide...
He likes to indulge in fantasies.
By chance, he obtains a cultivation technique that lets him control other people's emotions and collect emotional energy. Once he reaches human territory, he takes off.
(The plot during the Zombie Mountain arc is fairly ordinary due to his attributes. The cultivation technique only has room to shine once he reaches human territory.)