A game of chess. The sacrifice of a queen.
In London, 1973, two strangers sit across from each other in a park playing a game that will change both their lives forever.
One simple gambit will draw both Evelyn Copeland, a researcher, and Krystyna Zygalska, daughter of a Polish diplomat, into a labyrinth of secrets, betrayal and death, as conflicting realities lead to the uncovering of an event that occurred twenty-eight years earlier in 1945. An event that one person will go to any lengths to keep buried forever.