About the book: year / In the 25th century AD, the Earth returned to a primitive communal system due to a nuclear war that destroyed nature and civilization. Although the background radiation has decreased significantly over the past four hundred years, for unknown reasons, only twins are born to the surviving people. One of them - alpha - is physically perfect in every sense, and the second - omega - is burdened with a defect. By the will of the Sanhedrin that governs society, omegas are considered underdeveloped and defective, and alphas take away scarce resources. But although alphas consider themselves superior creatures, they cannot escape fate: if one twin dies, the other dies too. Cass has become a key figure in the Resistance; her brother Zack controls the Sanhedrin. The country is sliding into a full-scale civil war. Cass learns that in order to change the future, she must learn more about the past. But nothing could prepare her for what she discovers: Pandora's Box is full of secrets that raise the stakes ever higher.