The 5 sleuths consist of the siblings Betty and Pip, Harry and Daisy, and Freddy. The group is completed by Buster, their dog. During their holidays, they are all together and solve criminal cases without fear! Betty and Pip feel lonely during their holidays in Peterswood, as they miss the company of Freddy, Harry, and Daisy. The schools are about to open, and the brave group hasn't dealt with any strange case. However, when the 5 sleuths reunite, luck smiles on them, and they find themselves facing the mysterious disappearance of the lord of an exotic country, Prince Bongawa, which unsettles everyone and everything.