Set on Earth in the year 2065, destruction and confusion surround us. Cities are deserted, the population is decimated, and the precious few humans who remain must find a way to survive. In this world, we face death as we part with our loved ones. We begin to question what "life" and "love" is, and what is the philosophical definition of the "heart." After all in this world, science has analyzed life and death, expressing life as a form of energy.