Kit Taylor's life changes unexpectedly on his 18th birthday. After seeing his father's image in a mirror, Kit discovers an Advent Deck. Upon touching it, a dragon is unleashed into the human world. Things heat up in the world of Ventara.
Kit finds a way to exit the Advent Void with guidance from Eubulon, but there is a risk. Meanwhile, Adam fights with Len after the latter realizes he isn't Kit. During the battle, Adam's Advent Deck starts to become corrupted and turns him into Kamen Rider Onyx.
