The Hill-Clan Rabbit Tribe becomes entangled in a series of intriguing space adventures with the flying-rats from Rat-Star. Among the wooded hills and creeks they discover a wilding¿¿Zack¿¿a lone stripling¿¿ill prepared for survival. In desperation he¿d fled the Humans and that which was known as home¿¿and launched his life into a ¿river of no return¿. Zack joins the Rabbit Clan and the Star-Rats. As a result of a Space-Time experiment¿¿certain aspiring space-rabbits are drawn into the probing curiosity of the Black-Rabbits from planet Ektar. The Clan is stunned by the unexpected arrival of an Ektar space-craft, and become part of a Star-Alliance that allows them access to galactic exploration. Zack, Rudy-Rat and seven rabbits are invited on a special cosmic mission to the planet Ektar where they encounter dangerous alien life-forms. Zack the wilding wonders how a kid coming on fifteen has become part of an inter-planetary war. Eventually, as a cosmic Being, he joins up with his remaining Earth family.