A new evil organization known as Space Shocker (スペースショッカー Supēsu Shokkā), which are led by the magic-using Space Ikadevil (スペースイカデビル Supēsu Ikadebiru) and Space Spider Man (スペース蜘蛛男 Supēsu Kumo Otoko), threatens the Earth by causing an unknown phenomenon. The Space Sheriffs Gavan type-G and Sharivan are sent to execute all magic-users on Earth in response to the threat and begins to attack Kamen Riders Wizard and Beast. The Space Crime Syndicate Madou, who were once defeated by the original Sharivan return, to cause even more havoc in the world. During this, Yoko finds a mysterious little robot called Psycholon (サイコロン Saikoron), which Space Shocker and the Madou are after for unknown reasons.