Synopsis

The disappearance of a five-year-old girl snatched from her birthday party thrust Don and Terry into an investigation, one complicated by the need to enlist Charlie’s assistance. The girl’s father, Ethan, was himself a mathematician, and it was through him that Charlie began to grasp the kidnapper's intent. Ethan confided that he was on the verge of cracking Riemann’s Hypothesis, a notoriously challenging mathematical problem. A successful solution promised not only a million-dollar reward but a