In 1947, an octogenarian detective, now retired, seeks to unravel the mysteries that still haunt him. As he settles into a quiet farmhouse in Sussex, where he tries to find peace away from the hectic life of London, his mind remains preoccupied with a case that torments him. As his memory begins to fade, he realizes that the pieces of the puzzle he left behind no longer fit as they once did, especially the enigma of a murder he was involved in decades ago.
With the help of a young assistant, the curious Roger, the aged detective plunges into the memories of his career and the decisions that led him to retirement. Together, they reminisce about the encounter with his famous partner, Mrs. Watson, and the complexity of their relationship. Through flashbacks, old truths about his personal life are unveiled, revealing a human side of the genius that has been hidden behind his reputation as a prodigious investigator.
As the shadows of his past and his mind begin to blur, the detective faces not only an unresolved crime but also the need to reconcile what was with what remains of his life. With a touch of melancholy and a nod to nostalgia, the story invites us to explore the fragility of memory and the resilience of the human spirit, as Holmes attempts to find his place in a world that has changed too much in his absence.