The story features a female protagonist, an international setting, a historical hook, and puzzle-solving escapades.

Emma and Jordan are married and recent US Naval Academy graduates who live in Annapolis. They make a trip to Rocky Mount, NC, to join the extended Miller family for Emma's grandfather's funeral. Following the funeral, during the reading of the will, a secret about her grandfather is revealed. This secret sets Emma and Jordan on a journey to discover her grandfather's unknown family in Germany.

They uncover another secret after meeting the family, which launches them on an adventure across Europe, the Canary Islands, and Argentina, uncovering lost Nazi treasure and other Nazi secrets. They are called upon to assist in thwarting terrorist plans by the new Nazi party. Their adventure requires solving multiple clues and codes while encountering several hazards. Their journey weaves them through historical events and WWII locations, unraveling a mystery that bridges past and present.