The series focuses on the survivors of planet Beal, which was wiped out by a mysterious entity known as Gaizok. The few remaining survivors escaped to Earth and lived as normal people for centuries, collectively called the Jin family. While attempting to start a new life, the Jin family prepared for a
Gaizok invasion of Earth by building three vehicles which when combined form the super robot Zambot 3, piloted by Kappei Jin, Uchūta Kamie, and Keiko Kamikata. While defending against Gaizok attacks commanded by Killer the Butcher, the Jin family also face harsh criticisms from the people they protect, who blame them for causing the invasion. ==Production==