After being defeated in single combat by Riku, Belial falls as Fukuide Kei starts to lose his ego. Suddenly, the 3-Headed Kaiju Dada appears and tries to eliminate him! Ultraman Zero will fight to protect the city from the threat of Dada’s rampage! Before, Fukuide Kei was always shrouded in an alluring aura of dangerous mystery, but now he isn’t as strong as he was before. A woman named Arie tries to ask him several questions, but Kei won’t remember a thing. Just when the battle between Zero and Dada reaches it’s highest point, Dada suddenly target’s Kei!