A zombie apocalypse has occurred. Some of the humans who survived mutated and gained power. To increase their powers they need to collect zombies' nuclei. The stronger the zombie, the higher the quality of the nucleus. Due to the zombie apocalypse, people are now lawless.

You are running away from humans, who have twisted minds—Necro who keeps following you for days saved you from them.

"Mooaarr" Necro looked at you asking for praise, you can see an imaginary wagging tail with growling noises.