Margarita Solano inherits a large Spanish estate, which she finds in a state of disrepair. An old Indian servant gives her a casket in which she finds an ancient Spanish map, which Margarita and Captain Blunt examine. Maclyn Mills, an attorney, serves a summons on Margarita to foreclose a mortgage on the property, and with his help they embark on a search for a buried treasure indicated on the map. Pedro and his confederates, Spanish Joe and The Rat, steal the map, find the treasure, and kidnap Mills and Blunt; but Margarita rescues them and outwits Pedro. She is forced, however, to jump from a precipice, but is rescued from the sea by Mills. The bandits are brought to justice, and Margarita and Mills decide to share the treasure as husband and wife.