The Yankee Consul (1924)

Last-minute confusion forces travel agent Dudley Ainsworth to pose as Abijah Boos, American consul to a South American country. On a passenger ship bound for Rio, he meets Margarita Carrosa and becomes involved in a conspiracy involving Margarita and some thieves intent upon stealing a chest of gold from the consulate in Rio. Landing in Rio, Ainsworth notifies the U. S. Navy, then rushes to a castle outside the city where Margarita is being held captive. He rescues Margarita, captures the thieves, greets the summoned Admiral, who arrives accompanied by the real Yankee consul, and then finds that the adventure was all a joke devised by Ainsworth's friends.