Geologist Alex Cave is trying to recover an alien artifact from the crater of a dormant volcano in the Aleutian Islands when things go horribly wrong. The device is stolen and taken to COBRA, a privately owned top-secret research facility south of Yellowstone National Park. His good friend Doctor Henry Heinz is kidnapped and forced to assist with the experiments, but their tests begin creating adverse effects throughout the park and threaten a super volcanic eruption, which will smother the Earth in a blanket of dust for a thousand years.

His wife was murdered during a mission, and Alex thought he would never find another soulmate until he meets Fala, a Native American woman living in northwest Wyoming with her 10-year old daughter, Halona. When the COBRA experiment initiates the Yellowstone eruption, Alex watches in horror as Fala and Halona are killed by the blast, sending him into a deep depression.

While in mourning, Alex is given a chance to go back in time to try to change the outcome, but there is a catch. He will not remember what he needs to do to make a difference, and if he fails, he must watch them die an even more horrific death.

And if that wasn't bad enough, the changes he made to the timeline put his own family in grave danger by an old nemesis from his days as a CIA operative, and it seems his every attempt to change the outcome only makes matters worse. He realizes his only chance of saving his loved ones is to find a way to stop the eruption before it happens. The problem will be enlisting the support of his friends without being able to tell them why they must risk their lives to help him.

Can Alex find a way to save his family and civilization from extinction?