For twenty years, Elena Cross believed her father was dead. Then one night, she discovers a stolen hard drive containing secrets powerful people would kill to protect. Hunted by Black Viper, Elena is forced to trust Kael Morgan, a former operative with dangerous connections to her past. Together, they uncover Project Nightfall, a terrifying plan that could bring entire cities under the control of a hidden organization called Orion. But the greatest shock awaits Elena: her father, Victor Cross, is alive—and he knows the truth behind Nightfall. As enemies close in, Elena must uncover the truth before it destroys her.