Honoka Shibuki was a girl who wandered on the brink of death from injuries, but her father implanted a substance called the "Void Core," which possesses a powerful evil force, allowing her to survive. While harboring complex feelings toward her father, who sold his soul to a demon to prolong her life, Honoka awakened to the power of the Sailor Knights. Determined to use her saved life for the right cause, she became Sailor Lucifer and fought against her enemies. One day, a female monster named Langis, who held a grudge against Sailor Lucifer, lured her into a trap, intending to make her prey for a tentacle creature... [BAD END]