Daniel se enfrenta a un nuevo caso con entusiasmo, valent a y su libreta de las pistas. Qu misterio encierra la caja cerrada con llave que encuentra en el cobertizo de su casa? Distinguir en plena noche el canto de la lechuza? Seguro que Daniel ser capaz de superar las dificultades junto con Tango, su perro fiel. Daniel faces a new case with enthusiasm, courage and his notebook of clues. What mystery does the locked box he finds in the shed of his house hold? Will he be able to distinguish the owl's song in the middle of the night? Daniel will surely be able to overcome the difficulties together with Tango, his faithful dog.
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