The Chameleon and the Mysterious Pup

Hielke and Sietse are working on their boat, the Kameleon, when their father's lunch suddenly disappears. The chicken legs are nowhere to be found. The boys soon find the thief in the shed: a puppy. But there's something strange about the pup. To be sure, they have the puppy checked by the vet. There, it quickly becomes clear that Hielke and Sietse haven't just found any dog... Their search for the mother leads them to Huizinga's farm. Suspicious things are happening around that farm... What is Huizinga up to?