Robert Hannah, a brilliant Harvard-educated numerologist, had let his once-promising talents languish, burying them under stacks of poker chips. But when his old college roommate, now an FBI agent, throws a perplexing puzzle his way, Robert's dormant intellect awakens.

Together, they unearth an insidious plot so deviously simple; that it is nothing short of brilliant?a diabolical plan to orchestrate twelve perfect murders of wealthy young men over twelve months. But when the architect of this malevolent scheme discovers Robert's unexpected involvement, the stakes skyrocket.

A harrowing game of wits unfolds, and Robert Hannah must trust his instincts and employ his remarkable skills to unmask a vengeful genius before the calendar runs out.