In present-day Vancouver, Gail Lim, a producer of radio documentaries, is haunted by the mysterious events in her father's childhood in war-torn Asia, and using her skills as a journalist is driven to unravel the mystery of his past. As a boy, Matthew Lim hid in the jungle fringe near Leila Road in Japanese-occupied Sandakan, North Borneo, with Ani, a girl whose friendship shapes the rest of his life. Together they barely survive the terrifying events of the war, which shatters their families and ultimately splits them apart - until years later, they meet again, only to endure another separation.

At once sweeping and intimate, Certainty crosses continents, cultures and time to explore the legacies of loss, the dislocations of war and the redemptive qualities of love.