Bond and Stacey infiltrate Zorin's mine, discovering his plot to detonate explosives beneath the lakes along the Hayward and San Andreas faults, which will cause them to flood and submerge Silicon Valley forever. A larger bomb is also in the mine to destroy a "geological lock" that prevents the two faults from moving simultaneously. Once in place, Zorin and his security chief Scarpine flood the mines and kill the workers. Stacey escapes while Bond fights May Day; when she realizes Zorin abandoned her, she helps Bond remove the larger bomb, putting the device onto a handcar and riding it out of the mine, where it explodes and kills her.