What is the plot of the role playing video game Fallout 2

Fallout 2 was released in 1998 and is the sequel to fallout 1. The game takes place 80 years after the events of Fallout 1. The player assumes the role of the "the chosen one" who's home is ravaged by drought. He is tasked to find the G.E.C.K. (Garden of Eden Creation Kit) that will allow his home to survive the harsh wasteland.