From the introduction:
You are one of the Untethered, a psychically gifted individual able to construct a thought-body out of strange and subtle energies that pervade the cosmos. This projection - called a Specter - may look like you or not. Their forms are myriad and wondrous: great winged heroes fit to be called angels, yes, but also serpent-folk with hair of liquid fire, dream-eyed wraiths, and great spider-folk with arms and legs to spare.
During Stage 1 development this game was titled Stand Battles. During Stage 2 the title was removed, but not replaced.