The Forbidden Five are seeking out five Prismatic Blades across the Merged Realms in order to free Thunderfang, the Shatter Dragon of Chaos, from his imprisonment. Meanwhile, the ninja search for Jay, who vanished after losing in the Tournament of the Sources, and Arin, who left to search for his parents with the help of Lord Ras. With Sora joining Ras and Arin, the ninja are seeking to get them back and find Arin’s parents, who were initially thought to be dead but were revealed to be alive. Meanwhile, Thunder fang is planning to destroy all the Merged Realms and become one of the Source Dragons and the ninja must summon the Arc Dragon of Focus to stop him once and for all.