Don't I Know You? begins with a confrontation between Meg, a seventy-three-year-old retired doctor, and the police, who raid her home after discovering her son Nick's involvement in selling restricted medication on the dark web. This incident is a tipping point in Meg’s strained relationship with Nick, whose ongoing brushes with the law and aimlessness have left her deeply worried and exhausted. Nick still relies on Meg's support, and he shows little regard for the consequences of his actions. Frustrated and determined to force him into independence, Meg decides to sell her house. At the heart of the novel is the re-emergence of an old love. Colin, a man Meg once deeply loved but lost when he was conscripted during the Vietnam War. Colin’s number was drawn in Australia’s Birthday Ballot, sending him to Vietnam, while Meg’s future husband, Leon, was spared by chance. This separation altered their lives irrevocably, and Meg eventually married Leon. Yet, despite the passing years, Colin represents a love tragically cut short by war. Meg and Colin reconnect during a dramatic helicopter crash near Meg’s new apartment. Colin, displaying the bravery that once defined him as a soldier, risks his life to rescue the pilot and a young passenger from the wreckage. However, the incident stirs up unresolved feelings between him and Meg. Their reunion forces Meg to reflect on her life with Leon and the choices that led her away from Colin, while Colin continues to grapple with the emotional scars left by the war. As they attempt to navigate their complex past, a new threat emerges – someone wants Colin dead. His past in Vietnam, and the life he has led under an assumed name, begin to unravel. Although Colin tried to escape his past, the enemies and ghosts from that time have resurfaced. Don't I Know You? explores the lasting effects of war, unresolved love, and how the past continually shapes the present. Meg and Colin’s reunion offers a chance at redemption but reminds us that the past can never truly be left behind.