A mysterious letter has reached retired FBI agent Frank Malloy. A letter bearing a name from a lifetime ago, from a woman who claims she saw what really happened on the day John F. Kennedy died in Dallas. Many were there to film the president, but Helena Storozhenko snapped a photo on November 22, 1963, that would have changed everything. Then she vanished. Until now. From her death bed in Odessa, the Babushka Lady provides a piece of evidence that will send Malloy and network television host Jack Doyle on a desperate search for the truth. She has summoned Malloy and finally reveals what she witnessed in Dealey Plaza. Malloy and Doyle need each other to solve a decades-old mystery, and to stop an assassin who is driven by the same evil which changed the world so tragically – so long ago. It all comes down to one place, one time, and one bullet as they race to prevent history from repeating itself – more than fifty years after a president was brutally slain – and Helena Storozhenko was The Last Witness.