Synopsis by Janiss Garza
When famed insurance firm Lloyds suspects that Captain Machen (Herschel Mayall) is scuttling his ships for the insurance money, they hire Jim Landers (William Farnum) to investigate. Landers joins the crew of Machen's ship, the Dorothy Low, and immediately earns the enmity of nasty first mate Erickson (G. Raymond Nye). Erickson puts Landers in irons, but the captain's daughter, Laura (Jackie Saunders), has fallen for him, so she helps him out. Landers hides while Erickson, who believes he has been washed overboard, bores holes in the ship. The two men wind up battling it out, and the first mate drowns. Landers escapes with the Captain, Laura, and some crew members. With the mystery solved and the villain at the bottom of the ocean, Landers and Laura can now focus on their romance.