A modern-day historian uncovers a long-buried secret regarding a planned Nazi invasion of Ireland, triggering a dangerous confrontation that mirrors his father's wartime struggle. The protagonist must navigate the treacherous intersection of past and present as he attempts to verify the existence of Operation Green. He faces opposition from shadowy figures determined to keep the historical truth suppressed, forcing him to rely on his father's fragmented accounts to survive. The narrative employs a dual-timeline structure, alternating between the high-stakes espionage of 1940 and the contemporary investigation, creating a layered sense of urgency and historical consequence.

This work is characterized by its meticulous attention to the mechanics of intelligence gathering and the tension inherent in uncovering suppressed historical events. The dual-timeline approach effectively bridges the gap between the immediate danger of the 1940s and the scholarly pursuit of the present day. Readers likely appreciate the technical detail regarding the logistics of a potential Nazi invasion of Ireland, which grounds the speculative premise in reality. The narrative maintains a consistent level of suspense, driven by the protagonist's need to reconcile his father's past with his own survival in the present.