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.

Hamlet, Prince of Denmark, finds out that his uncle Claudius killed his father to obtain the throne, and plans revenge.

Years have passed since the Three Musketeers, Aramis, Athos and Porthos, have fought together with their friend, D'Artagnan. But with the tyrannical King Louis using his power to wreak havoc in the kingdom while his twin brother, Philippe, remains imprisoned, the Musketeers reunite to abduct Louis and replace him with Philippe.