Join Bridget Vanderpuff, Best Worst Baker in the World, and her best friend Tom on a spooky Halloween-themed mystery, high in the Alpine mountains where something ghoulish lurks. This final adventure is a recipe for fun with villainy, cake and sprinkles of silliness, heart and hope. Bridget, Tom and Mr Vanderpuff travel to the village of Butterälp, high in the Swiss mountains to stay with Vivienne Velvete - the world's finest chocolatier. They arrive to find a horrifying monster terrorising the villagers. Legend has it that Der Weremunch has red eyes, giant feet, loves chocolate - and cannot be stopped. With the creature on the loose, the village's chocolate festival - the Cocoacobana - has been shut down. What's more, Le Choc - the world's most perfect bar of chocolate, kept in an alarmed, triple-locked room - has been chomped! Bridget and Tom, with the help of Bridget's latest invention, must trace a track of confuddling clues and unravel their most fiendish plot yet to unlock the locked-room mystery and bring back the Cocoacobana chocolate festival.