Ronin Warriors is an OVA series of short movies which starts off after things have calmed down considerably since the defeat of Talpa. Sage has gone off to America to study; Ryo is celebrating his birthday; Kento’s won the lottery! However, the joyous mood disappears when the local news breaks a story about a strange killer in New York wearing mysterious armor. When the four warriors arrive to investigate, they are met by a new sinister force. The ancient sorcerer Shikaisen has discovered the power of the armors and is now intent on making them his own.