The film begins with "Capt. Briggs" (Arthur Margetson) informing Captain "Morehead" (Clifford McLaglen) that he’s taken his girlfriend “Sarah” (Shirley Grey) as his wife, also requesting to borrow a crew member for assistance. He's met with immediate agreement and they set sail. It doesn't take long before it becomes apparent that the danger isn’t solely from the surrounding environment; when a shot rings out toward the captain through his porthole, director Denison Clift begins to reveal how this ship ended up near Gibraltar, seemingly deserted. Bela Lugosi is unsettlingly good in the role of "Lorenzen," as is Edmund Willard portraying first mate "Bilson," and the film’s photography creates a dark, grainy, and genuinely threatening atmosphere as their journey becomes increasingly dangerous. However, the production values are noticeably low; there are documentary-style inserts, the dialogue feels basic, and Grey's presence detracts from the drama because her character seems underdeveloped—a criticism that could apply to many of the performers throughout the eighty minutes it takes for the story to finally get underway before rushing toward a reasonably believable but theoretical ending. The film has an edited feel, and while the narrative remains coherent, there are some odd breaks in continuity that don't improve things. It’s a decent story that deserved better treatment if more time had been invested in introducing the crew and exploring their motivations. As it stands, it feels somewhat oversimplified and rushed.

Source on TMDB