In a post-apocalyptic world where the sun has been consumed by a massive solar flare, rendering the Earth uninhabitable, Kai, a resourceful engineer with a talent for adapting to extreme conditions, embarks on a perilous journey to find a rumored sanctuary in the depths of space. Along the way, he discovers that the solar flare was not a natural event but the result of an ancient alien race that has been watching humanity and decided to intervene in its destiny.