After learning Siren and the Kid are being held on a remote planet known as Poseidon, a water world far from Alliance space, Nick Justice and Blaster Squad race to their rescue.
Blaster Squad soon find themselves under attack from all sides. Someone is determined to kill them and Nick suspects the mysterious figure known as the Master is behind the attacks.
They discover the Master is plotting to overthrow the galaxy and rule as Emperor throwing civilization into a new dark age ruled by terror and fear.
Nick Justice and Blaster Squad are determined to stop the Master's evil plans or die trying.