Young Kassandra Nishimura is an heiress to trillions of dollars. While she is relaxing with friends, six billion people are instantly exterminated on the other side of the planet. Seung Yi, a despot thought to be long dead, is back. Through the use of a self-replicating artificial virus called the extinction switch, he will wipe out all life on Earth unless humanity cedes the entire planet Mars, with all its cities, to him within six months. Kassandra’s grandfather Kato, Seung Yi's arch rival, must successfully launch a counterattack before the clock runs out. This will require a weapon of unprecedented size. Meanwhile, society disintegrates around Kassandra and friends, who are now trapped on Earth. Kassandra falls from the very top of society to being a starving refugee. She and her friends take refuge deep beneath a city. Even that becomes a bloody battle for survival, as the remnants of humanity start fighting each other. But, something awakens in Kasssandra's soul. She was always meant to be more than a rich party girl. Can Kassandra find her true calling, and can Seung Yi be stopped before it's too late?