Kamen Rider 555: Paradise Lost

Kamen Rider 555 the Movie: Paradise Lost (劇場版 仮面ライダー555 パラダイス・ロスト, Gekijōban Kamen Raidā Faizu Paradaisu Rosuto^?), was released during the run of the series, as a double feature alongside Bakuryu Sentai Abaranger: Abare Summer is Freezing! on August 16, 2003.

In an alternate timeline, Smart Brain has accomplished its goal of world domination — with 90% of Earth's population being Orphnochs while the human race had diminished to near-extinction. Takumi Inui, the user of the Faiz Gear, was regarded as mankind's savior until he was presumed killed during an attack by Smart Brain's Riotroopers. Since then, his friend Mari Sonoda has formed a human resistance group that have staged attacks on Smart Brain's headquarters in an attempt to steal the top-secret "Emperor Belts", but to no avail. The Orphnochs Yuji Kiba, Naoya Kaido and Yuka Osada wish to see both Orphnochs and humans co-exist in peace, but they are not taken kindly by the humans while Smart Brain chief Kyoji Murakami (who is now reduced to a head in a water tank) reminds them that humans no longer have a place on Earth. Murakami then discloses the existence of the Emperor Belts by introducing the Orphnoch Leo, who changes into the powerful Kamen Rider Psyga.

Meanwhile, in a human refugee camp known as "Paradise", Takumi has been living a different life as a cobbler named Takeshi and shares a home with a girl named Mina. When Yuji, Naoya and Yuka approach the human resistance and notify them of Psyga's power, Paradise is suddenly invaded by Riotroopers. During the attack, Masato Kusaka battles Psyga as Kamen Rider Kaixa, but is quickly defeated and killed. Psyga attempts to take the Kaixa Belt, but he is warded off by the three Orphnochs allied with the humans. That night, Takeshi and Mari meet at a masquerade ball, but when Riotroopers ambush the party, Takeshi regains his memories as Takumi and once again becomes Kamen Rider Faiz - who is reunited with Auto Vajin while dispatching the attackers. Takumi, however, is not pleased that Mari had spread rumors of him being mankind's savior while he was away. Furthermore, members of the human resistance suspect he is an Orphnoch himself due to his ability to become Faiz. Mina reveals to Takumi that years ago, her father found him badly wounded from the previous Riotrooper attack and implanted false memories in him. Shortly after giving Takumi back his Faiz Blaster, Mina is fatally shot by resistance member Mizuhara - who steals the Faiz Belt. Yuji kills Mizuhara in self-defense and recovers the Faiz belt before handing it back to Takumi, but the resistance exile Yuji, Naoya and Yuka from the group until they prove themselves they can steal the Emperor Belts.