While on holiday in the Black Forest, The Thea Sisters find themselves involved in a mystery , and search for a stolen and important piece of a cuckoo clock. If the piece isn't found, the entire Cuckoo Clock Carnival will be ruined. Together, Colette, Violet, Pamela, Nicky, and Paulina and with help from some new friends, they solve the mystery, and enjoy all the stops in between searching and following up on clues.