 In the exapansion of the game Firestorm, it takes off from the ending of Tiberian Sun. The serum Tratos created for Umagon did not work, and made her evolve into another mutant. Tratos had a GDI team retrieve the Tacitus, an item that once was a key to Kane s ultimate power. However, an Ion Storm made the Kodiak crashland in East Africa. After some incidents, you have to retrieve a CABAL unit, NOD s AI. The bad news though, CABAL had some "free will" to betray you. As a commander for GDI, you have to terminate CABAL while protecting innocent people. For NOD, you are a new commander who follows General Anton Slavik. The Brotherhood of NOD was at dissaray. He had you retrieve CABAL. However, CABAL gave you too many assignments which considered to be "dangerous" to NOD. While attempting to pull the plug, CABAL took control of all Cyborg units to kill the Inner Circle commanders. After fleeing to the Montauk, Slavik needs you to retrieve an EVA unit so that you can efficiently attack CABAL. No matter which side you re on, you have to team up with the opposite side just to survive. It is up to you to decide their fates.