Like every year, Scooti spends his summer vacation at his grandmother's and grandfather's place in Spain. Scooti has no idea yet how memorable his vacation will turn out to be this time and spends some time at the beach until his friends arrive. Suddenly he hears the whining of a little dog coming from the bushes. He approaches it and meets Mister Torro, a talking dog from outer space. Scooti adopts the little dog and takes good care of him. They play fetch, wander around the area and have a lot of fun together. After his friends finally arrive, they all go to the beach to explore and discover a hidden cave entrance. Despite Mister Torro's warning, the children's curiosity wins out and they enter the cave. They have no idea the great danger they are going to encounter... An incredibly exciting adventure novel mixed with science fiction.