The villains of Steam City are back at it again! First, Crimson Scorpion has an ingenious plan to steal a pair of priceless black diamonds by seducing Detective Onigawara. Then, Ling Ling's crafty sister Lang Lang is determined to be "an angel in black" for a sick little girl, fulfilling her last wishes... even if it kills her!

Nothing compares, however, to the death and destruction that Knight Phantom wreaks when he goes on an underwater rampage in a stolen submarine! Can Narutaki stop this dastardly plan before Steam City is engulfed in a sea of flames?

DVD Features: a tri-fold insert with an interview with creator Kia Asamiya, Japanese voice actor comments, production sketches, original Japanese opening animation, clean closing animation, Steam Detectives trailer, and previews.

Spoken Languages: English, Japanese, English Subtitles.