A terrible allergy made Tere and Pepe´s parents leave the city immediately. Now the siblings have to travel all on their own by bus to meet up with them in Port Sirena, on the other side of the country. Despite the ten days that this trip will last, Tere and Pepe are excited about the adventures they will have, until they arrive to the Leech Freeway, controlled by a group of men dressed in white. Besides, among the picturesque passengers that join them, there is the most ambitious and bad guy of all. Will they endure this journey? Will they make it to their destination?