Fortress F-99 is hired by archeologist Dr. Falcom to explore the mysterious planet Sitan for clues to an ancient riddle: the Sitan Kaleidoscope. The problem is that his rival archeologist, Dr. Reeje, has contracted B-DICE for the same job. A race begins to solve the ancient riddle: one that reveals the Sitanians' distinct mastery of life, space, and time.