In this long-awaited sequel in the Tumble series by Bob Triggs, the natural disaster sweeping the globe ticks up. As with his previous books, Bob's storytelling of an unimaginable catastrophe is relentless and explained with enough science to keep the reader enthralled as the tale progresses. A remarkable book with an incredible amount of research that will take you on a journey we all hope will never happen.

The story opens when Air Marshal Richard Brandon invites Australian meteorologist Quinton Andrews on a flight intended to extract their scientists off their bases on the ice so that he can take a closer look at a strange phenomenon occurring in the Indian Ocean.

Meanwhile, Cobra and Thelma have a lucky escape after jumping into the Cape Fear River during a hurricane as they attempt to cross south of the 35th parallel.

In London, geologist Dr. Peter Brown investigates what is thought to be an earthquake but concludes the single, sharp jolt that took out the city's entire utility services infrastructure is the result of something far more disconcerting. After determining that the epicenter of the disturbance is at the Elephant and Castle, he warns the Prime Minister that the city needs to be evacuated post-haste.

In Argentina, meteorologist Carlos Castelli, General Umberto, and Captain Luiggiani make a decision that affects Carlos in a profound way. He flies back to Buenos Aires from Puerto Madryn, where he makes a life-changing decision for himself and his wife, Isabella, who is not happy with what he has done.

The Canadian Prime Minister Michael Davies is beset with his own set of problems. He is trying to avoid a state of anarchy similar to that which has befallen the United States. Keeping the Canadian citizens calm until he is ready to lead them south is an effort. However, the Russian President, Matvei Bazhenov, and Generalissimo Mikail Yegorov offer Davies an olive branch that is hard for him to turn down.

In the meantime, President Sinclair is trying to keep some form of order in the southern US states. However, the expected surge of people attempting to cross the 35th parallel does not happen, and curious as to why, General Morgan orders eight teams of twelve Navy Seals on a 24-hour mission to infiltrate twelve cities. It was a night from hell for the team that went to Las Vegas with only four returning to tell the story. Of the ninety-six men sent out, eighty-seven never returned. But during this same meeting, Dr. Jack Bailey drops another bombshell.

Carl Felton, a wildlife biologist, is commissioned to investigate the devastating effect that a soda ash plant is having on the lesser flamingo population at Lake Natron, Tanzania. His old friend, Mwanyambi Bamgboshe, is the game warden at the Ngorongoro Conservation Area, and he called him on arriving at Dodoma. Carl had arrived in Tanzania prior to the grounding of commercial flights and, stuck in a foreign country, decides to visit Mwanyambi when the warden calls him to tell him of a strange event happening on the plains. He suggests that Carl should go there as soon as he can. With nothing else to do, he drives out to Mbulumbula Game Warden's Lodge, and he is stunned by what he is shown. But stranger still is the wind. It is alternating from hot before dropping and blowing up again as a cold zephyr.