Nantucket Police Chief Meredith Folger is acutely conscious of the stress COVID-19 has placed on the community she loves. Although the island has proved a refuge for many during the pandemic, the cost to Nantucket has been high. Merry hopes that the Christmas Stroll, one of Nantucket's favorite traditions, in which Main Street is transformed into a winter wonderland, will lift the island's spirits. But the arrival of a large-scale TV production, and the Secretary of State and her family, complicates matters significantly. The TV shoot is plagued with problems from within, as a shady, power-hungry producer clashes with strong-willed actors. Across Nantucket, the Secretary's troubled stepson keeps shaking off his security detail to visit a dilapidated house near conservation land, where an intriguing recluse guards secrets of her own. With all parties overly conscious of spending too much time in the public eye and secrets swirling around both camps, it is difficult to parse what behavior is suspicious or not until the bodies turn up. Now, it's up to Merry and Detective Howie Seitz to find a connection between two seemingly unconnected murders and catch the killer. But when everyone has a motive, and half of the suspects are politicians and actors, how can Merry and Howie tell fact from fiction?