After Talpa’s defeat, life settles into a quieter rhythm. Sage has traveled to America to continue his studies, Ryou is marking his birthday, and Kento has struck gold in the lottery. The peace is shattered when local news reports a mysterious killer in New York clad in strange armor. The four warriors rush to investigate, only to confront a new, menacing threat: the ancient sorcerer Shikaisen, who has uncovered the armors’ power and now seeks to claim them for himself.