Dead Star Dockyards

Life will eventually come to an end. This is a truth born from the laws of entropy. But the life of 'Humanity' will not come to an end from something so boring as the universe's heat death. But what would happen if this was no more than a simulation, not a digital, or even psychedelic hallucination. What if it was the result of something's curiosity about sentient life and the conditions that invoke it's creation? If it was interested about the possibility of life in the complete absence of something that it possessed in abundance? What if we have been working with a universe that is incomplete, missing an important element or piece that augments and sustains life in perpetuity? What if, in spite of this entity's power, it is unable to save us from a quick and painful end borne of our own progress, but which we could have never seen coming. What would happen to a humanity reduced to but two individuals if they were thrust into an ancient intergalactic society, constantly warring with itself over such minor inconveniences as spilled milk? Groomed from a young age to perform this task without his knowledge or his permission, our protagonist must figure out how to safeguard the future, and he has an idea as to how.