The planet Alpha Prime was once ruled by the Mariedians, an advanced race of peaceful aliens who had created machines known as Robota to serve them. A scientist grieving for his lost child locked the child's soul within a Robota, thereby creating the first Soulborg. Many Soulborgs were then created, but eventually they rose up against the normal still living Mariedians and enslaved many of them, imprisoning them on the prison moon of Isadora. However some Mariedians escaped this fate and wage guerilla war against the Soulborg from their strongholds hidden deep underground.