Father and son coroners receive a mysterious unidentified corpse with no apparent cause of death. As they attempt to examine the beautiful young "Jane Doe," they discover increasingly bizarre clues that hold the key to her terrifying secrets.

The hot-headed young D'Artagnan along with three former legendary but now down-on-their-luck Musketeers must unite and defeat a beautiful double agent and her villainous employer from seizing the French throne and engulfing Europe in war.