Liam Martin, a retired CIA black operations field agent, is sixty-four years old, still in top condition, and trying to catch up with the things he sacrificed while responding to urgent calls to duty. He resigned from the agency in anger after he chose duty over family and missed his wife's funeral, causing his daughter, Cathryn, to hate him.

He now travels alone under a series of identities to stay below everyone's radar. All was well until some well-heeled "patriots" found him and made a demand he could not ignore.

Based on his former activities for the CIA, the "patriots" want him to assassinate the president-elect and offer big money, and if he fails to comply, they threaten the life of his daughter, who is now the leader of an NGO team doing charity work in Africa. Liam teams up with his former partner, Sean Doyle, now high in the agency, and Eleanor Townsend, a three-star general who leads a think tank of retired military officers, to find the leader of the "patriots," his Chinese funders, and dismantle the plot.

In revenge, Chinese operatives try to kidnap Cathryn, but Liam resurrects skills from his dark past to rescue her. Liam begins a senior romance with Mary Riley, but the hope for a "happy ever after" gets derailed when Liam goes to Texas so that Brian, Cathryn's bodyguard, will not leave her in Africa to avenge his brother's murder.

Liam finds the murder scene, infiltrates the insurrection plot, and finds himself in danger when he tips off the general about the insurrectionists' shipment to Washington, DC. At the same time, Cathryn's team is held hostage in Niger, and Sean struggles to organize a dangerous rescue of the team, which would have to rely on Brian's skill and courage.

Home at last, Liam works to resurrect his romance with Mary and adjust to his new life situation. .