 Driven to find his missing father, KIT TAYLOR discovers a mysterious ADVENT CARD that gives him the power to transform into a KAMEN RIDER, an armored warrior who exists only in the MIRROR WORLD, a dimension opposite of our own reality. Kit joins forces with LEN, the leader of the KAMEN RIDERS, after he learns that his father may be a hostage of the evil GENERAL XAVIAX, a renegade warlord who gains his power by kidnapping people from this world. Kit, now KAMEN RIDER DRAGON KNIGHT, must quickly learn to use his newfound powers to battle General Xaviax and his evil army in the hopes that he will one day find his father. Little does Kit realize that if the remaining 10 ADVENT CARDS should fall into the wrong hands, it could pose a even greater danger... DARK KAMEN RIDERS...