Emily Webb is a quiet girl, the kind of girl you could definitely call a geek. She has only one friend, and is perfectly comfortable hiding behind her glasses and oversized sweatshirts. Suddenly, it's as if she wants to change her ways, but only at night. It started the night that the other Emily was murdered. Ever since Emily C. from school was found shot, it seems that she has developed a split-personality, changing from a nerd to a party girl. During the day, she wouldn't dare to flirt with another girl's boyfriend or sneak out of the house from her second story window. She wouldn't dare to be courageous for any reason, but at night, it seems she does exactly this. She doesn't understand what's happening to her and she can't handle when things start to get even stranger. Will Emily figure out why she's going through such difficult and confusing changes? Will she figure out if all that is happening is related to Emily C.'s murder?