The beginning of the end

Immersed in a universe where humanity's greed and excessive ambition have led to complete destruction, everything we once knew about Earth has been transformed. Following a devastating nuclear attack, the population was decimated and cities reduced to ruins. Agriculture was completely wiped out by radiation, and clean water reserves are now scarce.
Incredibly, only a small group of individuals managed to survive, mostly scientists and scholars, hiding in the safest refuge ever constructed. However, forced to quickly find a solution to preserve the future of humanity, these brave survivors discover that the dogs and cats roaming outside the shelter are remarkably immune to radiation. Astonishingly, they can even drink the contaminated water without suffering harmful consequences.
With this enlightening discovery, they decide to embark on an extraordinary experiment: combining the genes of these animals with those of the individuals remaining in the bunker. However, despite their noble intentions, the outcome of their experiments will not be as expected.
The boundaries between humanity and bestiality blur as new and dark abilities emerge in those who have undergone this genetic fusion. The fate of humanity hangs by a thread as the survivors grapple with the unforeseen consequences of their actions.
At the heart of this post-apocalyptic desolation, a story of hope and courage rises, as the protagonists strive to preserve their humanity, facing deadly challenges and difficult choices along the way. In the dark world they find themselves in, they must confront not only external threats but also the demons residing within them, fighting to survive in an uncertain future and rise from the ashes of a destroyed civilization...