While chasing the fortune worthy criminal Lamos on their Alloy Ranger, Space Hunters Kelly and Rambos were trapped by the protective field of the abandoned planet Tanwada. Just as they were struggling to find a way out, robot sisters “No.2” and “No.3” appeared out of nowhere and had asked to join them on their adventure! Meanwhile, a mysterious program infected the mechanical army on planet Tanwada and led to their continuous self-evolution.