The adventures continue with the junior detectives as they take on a new mystery, far from their home in a strange setting. What is this Grandfather clock? What secrets does it hold for the junior detectives? Can they solve such a complex and dangerous mystery alone or will they need help? The boys are joined this time with a new partner, a girl, who is smart, sassy and resourceful, which they are not used to. The boys have to learn to work together with this girl, because she holds the key to this mystery. This story is set on an old plantation that has a history of intrigue, mystery and adventure around every corner and some corners unseen. It will take some courageous efforts to solve The Secret of the Grandfather Clock and to make it out alive.