Adventure Girl

Young adventurer, Joan Lowell, with her elderly father, Nicholas Wagner, and two crew members, ex-marine William Sawyer and Otto Siegler, sail from New York to the Caribbean in their 48-foot schooner Black Hawk . Soon after their departure, Joan and the crew battle a hurricane, which damages their mast and casts them to a shipwreck graveyard. As Bill and Otto lay claim to the mast of one of these abandoned boats, Joan and her father board an old gunrunner, where Joan discovers a one-hundred-year-old map to a lost Guatemala jungle city and the hiding place of a giant sacred emerald. Afraid her superstitious sailor father will disapprove of her tampering with a dead man's belongings, Joan says nothing about her find but steers the schooner toward the lost city. Shortly afterward, however, she discovers that their boat's entire water supply was drained by the hurricane. Dying of thirst, Joan and Bill drift in a rowboat to an island where a native gives them coconuts and life-saving water.