Looking for an Alzheimer’s cure, something wrong occurred and the cure became a virus, generating a huge plague that kills more than half of world’s population. Also, new chemical weapons have transformed part of the survivors of the plague in ferocious zombie-mutants looking for nothing more than human flesh. To face the lack of food, many humans have voluntarily chosen cannibalism. During a chase, Ana is kidnapped by human hunters and Quim dies. Due to this sudden event, Alex must set out on a journey to rescue his sister.