Jack Standish feels responsible for the failure of the partnership with his father and goes to the South Seas where he falls prey to alcohol, is seduced by Lullaby Lou, a vamp, and tricked by a brutal plantation owner, Gordon Van Brock.
"Katy" Didd holds up the stage in which his sweetheart, Alice Mason, is traveling to her wedding to Prince Tetlow, to whom her guardian insists that she be married.
Inventor Peter Marchmont has discovered a purple light that renders the user invisible. On his release from prison, Marchmont, disguised as Victor Cromport, uses the light to revenge himself against his former wife, Jewel, and her partner, James Dawson, who framed him for theft.