A criminal sentenced to life on a prison planet reveals his true purpose: to extract revenge on the killers who murdered his family. A criminal sentenced to life on a prison planet reveals his true purpose: to extract revenge on the killers who murdered his family. A criminal sentenced to life on a prison planet reveals his true purpose: to extract revenge on the killers who murdered his family. A criminal sentenced to life on a prison planet reveals his true purpose: to extract revenge on the killers who murdered his family.