Polly Grimshaw (Marguerite Courtot), and her father, Capt. Abel Grimshaw (Herbert Pattee), unwittingly become involved in a liquor smuggling operation led by Leonard Craven (Gordon Standing), owner of the boat Grimshaw pilots around the coast of Florida. Polly's sweetheart, Robert Graham (Pierre Gendron), commander of a revenue cutter, discovers their involvement when they subject themselves to his prosecution. A trial ensues and the captain is cleared.