Released to commemorate Kamen Rider 555's 20th anniversary, the film takes place after the ending of the TV series. Masato Kusaka and Mari Sonoda are fighting a new iteration of Smart Brain led by Kitazaki, who begins an operation to exterminate all Orphnochs, with Takumi Inui seemingly working with them for unknown reasons since his disappearance.
Garo: Soukoku no Maryu (lit. Blue Cries of the Demon Dragon) is the second film to the Garo series. The film serves as an epilogue after Makai Senki and leads up to The One Who Shines in the Darkness. The story continues after the events of Makai Senki. Having made a contract with Gajari, Kouga Saejima honors his end of the deal by traveling to the Promised Land to retrieve a part of Gajari: the Fang of Sorrow. After Kouga defeated Sigma, Gajari transported him to the Promised Land, however, his quest had unexpected results.
The story starts in the devastated rogue city of Yokohama, surrounded by rubble. After Milly killed Jack, the main villain from the first movie, and finally satisfied her thirst for revenge for the deaths of her husband and child, she seems to be on safe ground for the moment. But just as she starts to relax, she is targeted by strange guys. They are here to avenge Jack's death.
In the aftermath events of GARO: Chapter of the Black Wolf, Saejima Kouga sets out to the northern district upon reassignment. While hunting down Horrors, a young priestess named Rin informs Kouga that she's been sent by Priest Amon to save a presumed dead friend in the Makai realm within Kantai, Jabi. Kouga teams up with Rin in a quest to save Jabi as they are hindered by supernatural and Makai forces alike. Meanwhile somewhere in Japan the dark Horror lord Legules was resurrected and plots a means to alter a supernatural event called White Night within Kantai to plunge the world into darkness with his "family." It's the final chapter of GARO as Kouga puts his life on the line to save Jabi and defeat Legules before the world is ruined.