《布莱切利四人组》的衍生剧，该剧有四个故事，每个故事两集。故事时间设定在1956年，原剧中的两个核心角色Millie和Jean来到美国，与两个美国密码破译专家共同调查新发生的谋杀案。BenCotton扮演命案侦探BillBryce。

Kat Emerson could really use a Christmas miracle! The aspiring singer-songwriter may have big dreams, but she has even bigger problems. Treated like a servant by her vain stepmother and self-involved stepsisters, Kat is forced into a demoralizing job as a singing elf at billionaire Terrence Wintergardenâ€TMs Santa Land. But there is one bright spot to the job Nick, the handsome new Santa at the tree lot. When Kat gets invited to the prestigious Wintergarden Christmas Gala, her stepfamily is determined to prevent her from attending and snag their own invitation. Could an attentive dog, a loyal BFF and a sprinkling of holiday magic help turn things around for Kat Join Laura Marano (Disneyâ€TMs Austin Ally), Gregg Sulkin (Marvelâ€TMs Runaways) and Isabella Gomez (One Day at a Time) in this modern-day reimagining of the cherished classic, featuring original music and holiday favorites.