Dr. Joanna Dare was working on a serum that would unlock the vast potential of the human body in 1939. However an act of sabotage resulted in her becoming the only recipient of the serum. Whenever she has an orgasm, Dare transforms into a superhuman adventurer. Her raven hair turn red, her body gains the strength of "50 men" and some degree of invulnerability. Her main enemy is Agent D, a female operative of Nazi Germany.