Join Francesca and Joseph DeLuca on their exciting summer quests in their home village of Somersby! Whilst building a den in the local woods, Joseph and his friends discover a crime scene, but can they help solve it? Francesca single-handedly finds illegal pollution in the river, but can she track down the culprit? And can they help in the battle to make Somersby a safer place on the roads and in nature for them and their friends? This crime-solving, nature-loving, environmentally friendly brother and sister have a summer of fun filled with kindness, camaraderie and daring adventures.