Book is in French The Three Musketeers should be lounging on the beaches of Shediac, New Brunswick, but Gabriel can't help but imagine worst-case scenarios around an island that doesn't just have a strange name. Skull Island, according to local people, contains human bones. And then, there is Roland and his chiac! A tour operator, he is very friendly and warm, but sometimes his behavior is strange. Besides, he was perhaps a little too quick to offer to transport the children to the island. While exploring the tiny island, Gabriel and Dali the dog (the fourth musketeer) find a parchment with a mysterious text , it doesn't take much for the young detectives' summer vacation to turn into an incredible ancient treasure hunt. .