Kamen Rider Movie War Full Throttle: Kamen Rider vs. Kamen Rider Drive & Gaim

After the finale of Gaim, peace has returned to Zawame City. However unbeknownst to the Beat Riders, a powerful alien named Megahex attacks Kouta and Mai's planet, wanting to release the curse of the Overlords and Helheim back on Earth. Meanwhile in Tokyo, Shinnosuke and his friends chase down a legendary phantom thief, but he discovers a mysterious connection regarding Krim Steinbelt.