"Ronin Warriors: Message" is a short OVA that serves as a sequel to the original "Ronin Warriors" series, also known as "Yoroiden Samurai Troopers." The story takes place after the defeat of the evil warlord Talpa and the restoration of peace. The five Ronin Warriors—Ryo of the Wildfire, Sage of the Halo, Cye of the Torrent, Kento of Hardrock, and Rowen of Strata—have returned to their normal lives, but their tranquility is short-lived. A mysterious new threat emerges, targeting the Warriors and their mystical armor, known as the Yoroi.

The narrative centers on a young girl named Sayoko, who possesses a unique connection to the Yoroi. She is pursued by a sinister force seeking to exploit her abilities to resurrect Talpa and plunge the world into darkness once more. The Ronin Warriors are drawn back into action to protect Sayoko and prevent the resurgence of their ancient enemy. As they confront this new adversary, they must also grapple with the emotional and psychological toll of their past battles, as well as the lingering scars of their previous encounters with Talpa.

The OVA explores themes of duty, sacrifice, and the enduring bond between the Warriors. Each character faces personal challenges, reflecting on their roles as protectors and the weight of their responsibilities. The story emphasizes the importance of unity and trust, as the Warriors must rely on each other and their shared resolve to overcome the looming threat. The OVA maintains the core elements of the original series, blending action, fantasy, and character-driven drama, while providing a concise continuation of the Ronin Warriors' journey.