In Kamen Rider Zi-O Ep. 42- 2019: A Missing World!, The world is reset as now Kakogawa Hiryuu reigns as king over it! Geiz attacks Zi-O with intent to destroy him in order to save the world and to protect all of his friends! Sougo doesn’t want to fight Geiz and so undoes his transformation, when just then…! Meanwhile, Kaitou Daiki, the man who searches the world for treasure, reappears in this new world as he makes his way towards Schwarz and Kakogawa Hiryuu! Just what is the treasure Kaitou is aiming for this time?