What seemed to be a normal day for Tagiru goes awry when his school is being absorbed into DigiQuartz before finding a Tsumemon that Digivolves into Keramon. When Ryoma arrives, Keramon Super Evolves to Chrysalimon as Arresterdramon and Astamon respectively Xros Up with Ogremon and Triceramon. However, Chrysalimon spreads DigiQuartz to Tagiru's house, making his mom and dad disappear among with other people. Hearing from Ryoma that the rest of the world would follow if this continues, revealing how he got caught up with Digimon, Taiki's group and Ryoma's group join forces to free the kidnapped victims and join the others as they demand answers from a non compliant Old Clock Store Owner. By that time, Chrysalimon Super Evolved to Infermon and overpowering the Hunters' Digimon until Tagiru and Ryoma execute a Double Xros between Arresterdramon and Astamon. With Astamon's fire power, Xros Up Arresterdramon battles Infermon until it turns into the same mysterious entity seen before and combines with others into a blob from which Diablomon emerges. With Yuu, Nene and Kiriha, Taiki forms Shoutmon X7 to aid Xros Up Arresterdamon and destroy Diablomon. However, the mysterious monster transforms into its true form: Quartzmon.
