When Earth can no longer breathe, survival becomes a race against despair. In a world poisoned by a deadly virus, the few remaining people on Earth take shelter in a building-one of the last safe places. As they attempt to reach Mars, old friendships resurface, tempers unravel, and hidden horrors come to light: a boy's forgotten journal, a woman's silent surrender to hopelessness, and a room overtaken by living fungi. But when survival starts to feel like madness, will escape bring peace-or something far more devastating?