Luna brought with her a hope for mankind and her death plunged the world into a post-apocalyptic disparity. Casshern killed her in a blind rage and now he confronts both his personal despair and a world that wants justice. But a rumour surfaces that Luna is still alive. With the rumour there is hope, and Casshern seeks to find her in search of closure and retribution. Meanwhile, others seek to find Casshern.
Beautiful in its bleakness, Casshern Sins concludes its journey and with it a profound meditation on life, death, guilt, violence and melancholy.