The animation isn't decoration here. It's the entire language of the story, every frame composed like a stage play where the vampires are soldiers caught between duty and damnation. MARS RED treats the vampire myth with the weight of genuine tragedy, not spectacle. A man watches the woman he loved become something he's now ordered to kill, and the show makes you understand why that costs him everything, why no amount of artificial blood can fix what's already broken.

Tokyo, 1923. Vampires have existed for a long time, but their numbers are now climbing fast, fueled by the illegal trade in Ascra, an artificial blood source. Under orders from Lieutenant General Sounosuke Nakajima, the army forms Code Zero, a covert unit that uses vampires to hunt vampires. Colonel Yoshinobu Maeda leads the unit, which must trace the source of the Ascra trade and capture or kill vampires while criticism threatens to shut it down. The S-class vampire Deffrot joins the investigation, and the unit's vampire members struggle to come to terms with their new powers and with no longer being human. Code Zero has to contain the crisis before society collapses, or be consumed by its own monstrous nature.