When Callie learns that the man she loves is somehow connected to the man who killed her late husband, she confronts Tom. But he informs her that his hands are tied by the National Security Agency and he can tell her nothing.

Despite the secrecy surrounding Tom and the NSA, Callie decides to find out for herself exactly what is going on and how Tom may have been involved in her husband's death. Using her investigative skills, Callie throws herself into the most important mystery she has ever attempted to solve.

Will their affection be able to stand the strain? And what was God's plan in bringing Tom and Callie together - marriage or merely answers for her questions about Bryan's death?