Searching for clues regarding her brother’s disappearance years earlier, Sophie Hennes learns it has something to do with the term ‘El Dorado’ and falls headfirst into the hidden world of the Horrors. There she would have died if it were not for Sword, the current Golden Demon Knight, who is hunting El Dorado for his own reasons and eventually agrees to let her assist in the search.
A partly episodic action-drama with some minor horror, comic relief, and ecchi elements. In regard to the two previous Garo animated series, it includes a few character references to Honoo no Kokuin and has no notable connection to Guren no Tsuki.
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