In "One Bad Apple: A Hannah Swensen Mystery," the college in Lake Eden taps Hannah to teach a class in baking. However, something goes awry with the equipment she's using, and an explosion ensues. Although deemed an accident, someone of course turns up dead, and it's up to Hanna and her family and friends to solve it. During the investigation, she meets Victor Webster's Chad Norton, and it's anyone's guess as to whether or not he comes between Hannah and the absent Mike Kingston.

Reprising their roles are Tess Atkins (Michelle), Barbara Niven (Delores), and Lisa Durupt (Andrea) who all appeared in the last film, "A Zest for Death: A Hannah Swensen Mystery," in 2023. Gabriel Hogan who previously appeared in "Sweet Revenge: A Hannah Swensen Mystery," and "Carrot Cake Murder: A Hannah Swensen Mystery," as fan favorite Norman, will also be returning in the new feature. 

When TVLine reported news of the film, several fans commented on its website that they were upset Cameron Mathison would not be returning. The outlet contacted Hallmark who told them his being cut from the film had to do with staying in line with the events that unfolded in the novel series, particularly involving Hannah and Mike's future. Also, Mathison continues to play Drew Cain on "General Hospital," and even joined GAC — Hallmark's rival company — in a multi-year deal in November 2023, so his schedule is probably full.