The player takes control of a fighter ship capable of mutating into different shapes. The ship's appearance changes with upgrades as the player obtains weapons.

The inhabitants of the planet Lakya unwittingly unleash the planet's life force known as Evol. As the released Evol drifts from planet Lakya, it is received by the inhabitants of the nearby planet Cokyo; the people of Cokyo initiate the Shlohe project, a plan to use their captured Evol to develop advanced biologic ships and weapons to invade planet Lakya. The inhabitants of Lakya retaliate the Cokyo invasion by using their own evolving fighter ships.