The novel follows the story of Jacques Austerlitz, an architectural historian who was brought to England on a Kindertransport from Czechoslovakia during World War II. As an adult, Jacques embarks on a journey to uncover his past, including his original identity, his parent's fate, and his own lost history. The narrative is a haunting exploration of memory, identity, and the lasting impact of the Holocaust.

The novel delves into the complexities of memory and the chaos of war, weaving together the narratives of several characters whose lives are entangled by the events of World War II. Set against the backdrop of the German invasion of France, the story unfolds through a series of flashbacks and stream-of-consciousness reflections, primarily focusing on a French cavalry officer captured by the Germans. As the characters grapple with their experiences and relationships, the book explores themes of loss, betrayal, and the elusive nature of truth, all while challenging traditional narrative structures with its fragmented and non-linear approach to storytelling.