The Defenders must fight a fanatic cult calling themselves the ""Leauge of Flesh and Blood"" who are opposed to the existence of robots, beleivng that they are crippling human independence.

Flash develops a romantic bond with the female member of the group, Kala.

When a shocking revelation about the League is exposed, Ming the Merciless, hoping to imoprove his army's robotics, takes advantage of the League's shameful secret and strikes a bargain with them, and it involves kidnapping the young Defenders. Can Flash and the Defenders save them?