Ninety-six-year-old socialist firebrand Nina Isakson isn't looking for a quiet retirement.

 

When she moves into the Good Oaks retirement home she recognizes neighbor "Herbert Smith" as Alois Schicklgruber, the man who abandoned her and their unborn daughter seventy years ago in Munich 1914, a man she suspects went on to become Adolf Hitler.

 

To the world, she looks like a "crazy old bat". But to an unlikely trio: a rookie cop, a skeptical medical student, and her own Harvard professor grandson she is the key to one of the greatest cold cases in history. 

 

To prove the impossible, they must decode an unknown language and recover century old audio from wax cylinders that shouldn’t exist. How far will they go to catch the world’s most notorious monster? And what happens if the only person who knows with certainty has been frozen to minus 196 degrees Celsius?