Derived in German folklore, doppelganger is defined as a wraith or phantom of a living person that is fundamentally a spirit double. Inspired by this concept, "Doppelgänger" stretches the idea to what if our dream-selves are a form of doppelganger living alternative lives but still tethered to us through our unconscious dreams and to hopefully never meet in our waking world since to meet one's double is believed as a sign of imminent death.