Leo and Blas spend a week's vacation at their eccentric uncle Sigfrido's house. As the seven days pass, the brothers find themselves involved in seven mysteries, each one having something to do with one of the seven arts. They have to use their intelligence and common sense to resolve the seven riddles. Leo y Blas pasan una semana de vacaciones en casa de su excentrico tio Sigfrido. Conforme pasan los siete dias, estos hermanos se veran envueltos en siete misterios distintos de lo mas trepidantes, cada uno girando en torno a uno de los siete artes. Tendran que usar su inteligencia y sentido comun para resolver ... los siete enigmas.