In the year 2199, Earth is under attack by the planet Gamilon, and radiation will destroy the planet in one year. While Earth fights a desperate battle at Pluto, a message of hope is found at Mars.
Derek Wildstar and Mark Venture learn from Captain Avatar that the sunken World War II battleship Yamato is being converted in a space battleship, which come under attack by a Gamilon carrier.
The Argo is forced to land on a mysterious floating continent in Jupiter's upper atmosphere. But when they are attacked by Gamilons, the Star Force decides this will the perfect test for the Wave Motion Gun.
The Gamilons believe they've sunk the Argo on Pluto, but Captain Avatar has some tricks up his sleeve. Meanwhile, Wildstar leads a team to destroy the Reflex Gun.
The Star Force captures a Gamilon pilot. As they get their first look at a Gamilon, Wildstar remembers when his parents were killed in a Gamilon attack.
Tempers flare between Wildstar and Venture, as the Star Force, already behind schedule, must find a passage through a star cluster generating a dangerous space storm.
Nova and IQ-9 are sent to survey a planet inhabited by bee people. A rebellion is brewing among the bee people against their queen, who is serving the Gamilons.
In defiance of Lysis, General Volgar uses a device to manipulate matter from the planet Balan, creating a monster he hopes will destroy the Star Force.
The Star Force encounters a space fortress emitting a magnetic wave that tear the Argo apart. Wildstar and Sandor are sent to deactivate it. Sandor blames himself for the death of Wildstar's brother, Alex.
Gamilon General Lysis is faces a court martial for destroying the base at Balan. But Desslok gives him a reprieve, and another chance to defeat the Star Force.
As the Star Force battles the Gamlons at the Rainbow Galaxy, Lysis launches a huge drill missile into the firing gate of the Wave Motion Gun. Sandor and IQ-9 race the clock to prevent the destruction of the Argo.
The Star Force approaches their destination, but which of the two planets is Iscandar? They soon find out, as the Argo is pulled into Gamilon's acid sea.
The Star Force arrives at Iscandar to receive the Cosmo DNA device, which will restore Earth. Wildstar gets some surprising news. And mutineers kidnap Nova, and plan to stay on Iscandar.
