Cassidy Gray has always loved American Muscles. So when she spots Sam and Dean's 1967 Chevrolet Impala abandoned in a junk yard, she knew she had to buy her. But what she discovered when she restored the car, she definately didn't expect. Their father's journal was one of them. She cast them aside at first, but when Demons came knocking on her door that night, she had no choice but to believe in it.