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.