Here's an update so you can keep the characters straight, Jules:

Scott - is the History Prof who's fallen in love with a missing person - Marilyn - who thinks she's from the 1930's

Abe - is the detective trying to find out Marilyn's true identity

Ella - is the bookstore owner who 'adopted' Marilyn and gave her a job in the shop and an apartment above

Harry - is the man who helped Abe and Scott solve a cold case dating back to the 1930's

Hope this helps :)