A genius but also a lovely girl, Spencer Hastings has a good time with her friend Toby Cavanaugh up until she ends up in the hospital with no memory what so ever. With her memory being gone, so is Toby. Her friends Hanna Marin, Aria Montgomery and Emily Fields try to bring back her memory back by trying to help her remember what happened the night she was out. What happened to Spencer that night? Will she be haunted by her memories? But what about Toby? What happened to him? Is he alive? Or dead?