300 years ago, a group of monsters called Devolian was sealed by five knights (Tokurangers). However, two Devolian named Svelia and Barulia escaped, attacked the knights from behind and stole their changers, leaving them dying. Takami, the son of Red Knight, chased them until an unknown portal suddenly opened in front of them, sucking all of them into Tokyo, 300 years in the future...