The royal family has gathered at their Scottish retreat, Balmoral Castle, for a traditional Christmas. As everyone circles up for a holiday toast, King Eric is about to name his successor. But as he raises a glass of his favorite whiskey, he drops dead. What happens in the castle usually stays in the castle, but a murder might be too big for these battlements. The king's chef, Jonathan, is determined to expose the truth, even if it puts him in a killer's crosshairs—and shakes the monarchy to its core.