'Tis the season for an investigation! Lady Julia and Nicholas Brisbane return for a Christmas caper at Bellmont Abbey—.

After a year of marriage—and numerous adventures—Lady Julia and Brisbane hope for a quiet, intimate Christmas together—until they find themselves at her father's ancestral estate, Bellmont Abbey, with her eccentric family and a menagerie of animals.

Nevertheless, Julia looks forward to a lively family gathering—but amongst the celebrations, a mystery stirs. There are missing jewels, new faces at the Abbey, and a prowling ghost that brings back unwelcome memories from a previous holiday—one that turned deadly. Is a new culprit recreating crimes of the past? And will Brisbane let Julia investigate—?