The end of the world came quietly and completely unnoticed. There were no loud trumpets, no catastrophes on a universal scale. Epidemics just broke out and civilization came to an end. There are survivors who desperately cling to the past and the world around them. Nature, so to speak. And everything is different now, but you want to live... How will you survive here, especially if you meet a mouse weighing five kilograms, and you have three cartridges for a hunting rifle?! Perhaps only on instincts and genetic memory. And here the main question arises: what is this gene memory?