Gish is a ball of tar who lives happily with his human girlfriend Brea, until one day a mysterious dark creature kidnaps her. Gish fights through several levels of enemies in the sewers of Dross until the final boss appears: Hera, Gish's former classmate who has an unrequited affection towards Gish. Gish rejects her, and Hera threatens to drop Brea into a pool of lava. After Gish defeats Hera, he must rescue Brea. If the player succeeds, Brea and Gish escape and become famous entomologists, as well as the world's first legal inter-species marriage. If the player fails, Brea burns to death in the lava pit and Gish goes on to live a life of celibacy, "volunteering most of his time to charity organizations that specialize in bringing lava awareness to the mainstream." In the latter case, Brea's picture is crossed out from the final group photo of the game.