A simple trip to New York City goes horribly wrong when Rory is sent back to the 1930s by the Weeping Angels. There he finds that River is investigating the angels and Manhattan has become their hunting grounds. The Doctor and Amy must find Rory before it is too late, but they soon find that not every point in time can be changed. And here, the Doctor must do the one thing he has been dreading – say a final farewell to Amelia Pond.