Prometheus Bound is an Ancient Greek tragedy based on the myth of Prometheus, a Titan who defies the gods and gifts humanity with fire, for which he is subjected to eternal punishment. The play is composed almost entirely of speeches and contains little action since its protagonist is chained and immobile throughout. At the beginning, Kratos (strength), Bia (force), and the smith-god Hephaestus chain the Titan Prometheus to a mountain in the Caucasus, with Hephaestus alone expressing reluctance and pity, and then departing. According to the author, Prometheus is being punished not only for stealing fire, but also for thwarting Zeus's plan to obliterate the human race.