On a distant red planet, a tyrant kills the king and imprisons the queen. The crown prince escapes to Earth with a droid, befriending a stray dog.

Far distant from Earth on a red planet of Antars, a tyrant Zanu has killed their king and imprisoned the queen. The crown prince, their son, named Yubi (Christopher Burton) has escaped to Earth in a company of the droid Zax (voiced by Ric Spiegel), where they have become friends with a stray dog named Benji.—margosanci