Susan Kelley, graduate student in historical studies, is working to unravel a mystery left among the research papers of her late professor, Dr. MacAllister. Alone in the dusty confines of the History Department archives, Susan steps through a storeroom door and into 1957. To her surprise, she meets up with not only a young Zack MacAllister, but also many of her relatives. Despite the differences between her modern day life and the one she's found in 1957, Susan quickly acclimates to her surround