With his sister's urging, elderly Jeremiah recounts the first of their many youthful adventures. Jeremiah and Susanne discover a lot of the Morris clan's family history, and young Jeremiah is only beginning to figure things out. The whole mess starts when Jeremiah's family visits the grandparents in Britain. It soon becomes freakishly apparent that most of Jeremiah's ancestors dating back to 1745 currently reside in Nana and Papa's attic - and they are full of useful information. It turns out his eighth great-uncle Edgar was wrongly hung for murder centuries ago. Inspired by Edgar's parents, the Earl Mortimer and the Countess Leila, Jeremiah, with Susanne, decides to help his disgraced relative and solve a mystery from the 1700s to bring closure to Edgar and his beloved Jemima. Throughout his investigations, Jeremiah makes a shocking discovery: some of his ancestors really are killers. As he solves an old mystery, a new murder has to be stopped: Jeremiah's own! With the help of other quick-thinking ancestors, he must avoid becoming another dead occupant of Papa's attic. To stay alive, Jeremiah will quickly learn what kindness and fair play can do against evil.