A reasonable South Seas treasure hunting adventure, though you'll have probably seen the basic story better executed elsewhere.
After they find a vase in an antique shop, two professors (James Aubrey and Henry Roquemore) think they have found evidence of a long lost civilisation in the South Seas. They track down the sailor who found the vase, Dick Nelson (Richard Talmadge), who is a good seaman but is never far from a fight, and hire him. The ship owned by King (Charles K French) is also hired so Nelson can lead the profs to where he found the vase. King's daughter Madge (Alberta Vaughn) stows away but thats not the main problem for the mission, Nelson's bitter rival Bull (George Walsh) is the First Mate and aims to seize the ship and end Nelson once and for all...
A basic and unoriginal story which is executed mostly adequately. The character of Bull is ridiculous though, he ends up blowing up the ship and marooning himself and his minions on an island but for some reason the minions still listen to him!