: Meanwhile, Kate's husband Rob, a professor, is in California with their daughter Jessie and student Jake. They are caught in the escalating seismic activity at the San Andreas fault, unaware that Kate is at the center of the global crisis.

: Kate attempts to convince the Department of Defense to shut down the Hellstorm device. She faces heavy skepticism from high-ranking officials like Pierce, who refuse to believe the machine is even active. Her only ally is Drew, a data specialist who realizes the numbers don't lie.

As the "countdown to disaster" ticks down, Kate and Rob must work from different ends of the catastrophe to reunite their family and find a way to deactivate the weapon before the final shockwave triggers a global extinction event.

: The brilliant scientist who knows the truth about the Hellstorm.