When up-and-coming singing sensation Shelby Vaughn arrives in town for two weeks of concert dates, she hires her old friend Angie and the rest of the bakery crew to supply cupcakes for the VIP guest lounge every night. After overhearing Shelby in a heated argument with her manager, Mel is concerned, but she and the crew decide to make the best of their time working with the star. Just as the bakers fall into the rhythm of the job, Shelby's manager is found dead, clutching a bit of fabric from a Santa suit and a cupcake. With the bakery crew and Shelby's backup dancers all dressed in similar Santa costumes, it's impossible to say who is the killer. When all suspicions lead back to Shelby, Mel and Angie stand up for their friend, determined to prove her innocence before she's frosted for a crime she didn't commit.