An attack on a defector (Diana Hyland) convinces the partners of her sincerity, until they also become targets.
The Eagle orders two of his agents to transport a large supply of gunpowder to Los Angeles.
Imprisoned with his friends in the Eagle's cellar, Diego makes false promises to convince the Eagle's men to set him free.
The Eagle threatens to torture Don Alfredo to obtain the names of those sworn to fight the king's enemies.
When Diego and Bernardo discover that the Eagle is smuggling cannonballs inside art treasures, they attempt to destroy his cannon.
