War has been going on between the Nightmare King and the Guardians since the Golden Age. The Guardians swore to protect all children until they harmed Pitch's younger brother, who he had been looking for since they got separated. [Pitch Black & Jack Frost/Jackson Overland - Brothers] [Pitch Black & Susanna Overland/Snow Queen/Nightmare Queen]

A week after their five-month anniversary, the Ichijouji's were attacked; Ken and Wormmon are missing. Three weeks after Ken's disappearance Yamato receives a video in the mail. The video reveals Ken's condition and whereabouts. Will Yamato ask his friends for help to save his boyfriend or will Yamato go alone? [YamaKen, Daiken, Taisuke, Osamu/Ken]