A deadly, unstable shooter. A trap Malcolm and Seong-Jae can't escape. And more than one life on the line as they find themselves facing down one of the Golden Ratio Killer's proxies in a high-stakes hostage situation that could ramp up the serial murderer's mathematical body counts exponentially. And if Malcolm and Seong-Jae aren't careful, they'll be among the tally. While back home, Huang's life hangs in the balance—and Anjulie walks a thin line between justice and deception. Everything's spiraling out of control. And the more they fight to survive, the deeper they sink into a twisted game governed by not one, but two minds. With Sila and the Golden Ratio Killer as the players … Will our heroes end up as nothing more than pawns? Contains mature themes.