With Mitsuzane confirming his worse fears with news of monster sightings, Kouta resolves that the Beat Riders need to work together to stop the invading Inves. However, Team Baron, Kaito explains that none of the Beat Riders will help them. Later, Kouta and Mai come to Bando's aid when he is attacked by a Bat Inves when it thought the fruit he was picking up was Lockseeds. As Mai takes Bando to safety, using the Ichigo Lockseed to get an advantage, Armored Rider Gaim fights the Bat Inves before it escapes. Later that night, seeing the Suika Lockseed regained its function, Mitsuzane is confronted by Takatora who believes the item was stolen by a Beat Rider as he defends them while concealing his association with them. The next day, Team Gaim orchestrates a plan to search the city for the Inves. Scolded by Mai for scaring an old lady, Kouta meets up with Mitsuzane in Drupers where they learn that the Inves can only fruit from Helheim Forest. Having an idea, Mitsuzane goes to Helheim Forest with Kouta to secure a premature fruit by entrusting Kouta with his Sengoku Driver so not to mature it. After Gaim suffers some humiliating moments during their stake out, the Bat Inves arrives and the Armored Riders attack with Ryugen placing a tracer on the monster before it escapes. The tracer leads Kouta and Mitsuzane to a factory where they find Helheim plants before being attacked the Bat Inves. Though the Armored Riders succeed in destroying the Bat Inves, they find more Inves have entered their world and witnesses them being destroyed by the white Armored Rider that almost killed Kouta. Seeing the white Armored Rider's supporters proceeding to burn the plants away, Mitsuzane realizes they are concealing for realizing the white Armored Rider is his brother before he and Kouta are forced to flee when the fire starts consuming the factory without being spotted safely. At Yggdrasill, meeting with Ryoma to discuss the increase of portals, Takatora offers to test one of the new belt models to secure humanity's future.