Chicago sixth-graders Jack and Ruthie return to the Thorne Rooms at the Art Institute of Chicago and once again go back in time while trying to stop an art thief from endangering the miniature rooms.
A magical coin leads sixth-graders Ruthie and Jack to 1753 Massachusetts and to Jack's pirate ancestor when they return to the Art Institute of Chicago's miniature Thorne Rooms on a mission to restore an African American family's reputation.
