In a landscape strewn with dollars, how do you catch a killer who's playing for higher stakes than money? Ex-detective Evan Adair has a gift for working out how the dead got that way, but the truth never brought anybody back. After twenty-three years at the NYPD and a devastating private loss, he wants no part of another investigation. But an old colleague comes calling with a tantalizing riddle. A Wall Street wunderkind, a young quant with everything to live for, has taken a bizarre public dive from an opera balcony. Was the fall his own idea? And his injuries, as it turns out, weren't enough to kill him. So how—and why—did he die? Soon there is another death, this one a vicious knife attack. The dual investigation draws Adair into the byzantine worlds of finance and high-stakes biotech. He finds secrets with long histories and numbers that can talk—if only he can figure out how to listen.