In Paris with his parents to sell family heirlooms, fourteen-year-old Greg Rich suddenly finds himself four hundred years in the past, and is aided by boys who will one day be known as "The Three Musketeers."

In seventeenth-century France, young d'Artagnan initially quarrels with, then befriends, three musketeers and joins them in trying to outwit the enemies of the king and queen.

Francia, siglo XVII. Athos, Porthos y Aramis son tres prodigiosos espadachines que pertenecen al cuerpo de mosqueteros del rey Luis XIII de Francia. A París llega un joven y valeroso gascón que ingresa en la guardia del Rey para hacerse mosquetero. Los cuatro tendrán que hacer frente a una maquiavélica conspiración urdida por el cardenal Richelieu para derrocar al rey