In this Halloween episode, Emerson and Olive track down "the ghost" who's been killing the jockeys at the old race arena where Olive used to race as a former jockey herself. With help from Ned and Chuck, they try to solve the big mystery.

Olive calls on the Pie Maker and Emerson to solve a suspicious suicide of a fellow nun that she believes is murder. Meanwhile, Chuck considers what to do in the present with her new lease on life.