In a future Boston, a passenger train disappears from a subway system so complex the system creates a second dimension. Government officials work to retrieve the missing car, but struggle to solve the impossible mathematic equations the system created.

Frank Boles leaves Minnie's jook joint after a drunken evening and has an unexplainable encounter with an otherworldly visitor.

After World War II, as he skis in the mountains of Switzerland, a Jewish Frenchman recognizes a German man who once left him for dead in the snow as a child.